Saturday, February 23, 2013

How to care Orchid flower


How to care Orchid flower:

Orchid Care Tips

Orchid care is not difficult, it is just different. Orchids have a reputation for being difficult to grow when in fact many varieties make excellent house plants. With proper culture an orchid can be in bloom for months each year and can live indefinitely. In this respect orchids are an excellent value as far as blooming plants go. A well cared for and varied orchid collection can provide continuous bloom every day of the year. Good orchid care requires just some basic knowledge about orchids and how they grow.


The Orchid Family has diverse care needs




The orchid family has over 880 different types (called genera) and over 22,000 species. These nummilies. In general Orchids are largely tropical plants which live as epiphytes or "air plants" hanging on to trees for support. Some orchids are lithophytes or "rock plants" growing on or among rocks. The remaining orchids are terrestrials which grow in the loamy detritus of the jungle ant family this diverse it is challenging to give general guidelines on orchid care. Yet, there are only several dozen species widely produced and even fewer that are available at a local nursery.The plants sold at nurseries, florists, hardware chain stores and groceries are likely to be hybrids. These hybrids have been created by crossing different species, and sometimes different genera to breed in desirable characteristics such as color, fragrance, flower size and ease of care and breed out many of the challenging care aspects of pure orchid species. Todays orchid hybrids are very rewarding house plants to grow and are relatively easy to care for if you take a little time to understand their basic needs.



Orchid Growth Environments as they relate to Orchid Care



Imagine standing in a jungle and looking up at an orchid that is clinging to a tree. Its roots have grasped the tree bark and are using the tree for support. The orchid gets no nutrients from the tree itself, it is not a parasite, it gets only support and a bit of food from the organic matter decaying in the crooks of branches or from animal droppings that wash down the tree in the rain. It is humid in the jungle and these orchid roots have adapted to absorb water from the humid air, hence the term "epiphyte". Many orchids have to deal with times of abundant water and times of dryness and so they have thick stems called "pseudobulbs" that allow them to store and hold water for the dry periods to come. Imagine now, this same plant in a pot in a typical home environment. How strange this must be for the plant and how different it is from the conditions to which the orchid has adapted. Understanding the natural conditions in which the orchid grows, known as 'in situ', is critical to understanding what the orchid needs for its care.

Fundamental to successful orchid care is understanding the requirements of the orchid for support, light, food, humidity, water, air movement and temperature.

What is the best Orchid Mix?


First and foremost, orchids do not grow in dirt, it will smother their roots and kill the plant. Orchids require special media in which to grow. The best media for an orchid is the one that best matches the type of orchid and the conditions in which it is growing. The conditions on a sun porch in Florida are different from a heated home in Ohio yet orchids, with proper care, can thrive in both. Often multiple media are mixed together in an orchid mix with each ingredient bringing unique desirable characteristics to the mix. The goal is the same, to use a mix that is open and airy and brings to the orchid the appropriate amount of moisture for its needs.

What kind of Orchid Pots should I use?



Orchids do not grow in pots in the wild. We put them in pots for our convenience. As a result we must understand how strange this is for the plant, their roots like to breath and be free. It is perfectly fine for orchid roots to grow outside of the pot. Unfortunately, our homes are not humid enough to support epiphytes well. So, a pot helps by holding some moisture around the roots. The secret to growing healthy orchids is to grow healthy roots. Ordinary potted plants are judged by their leaf growth. For orchids, the root growth is the best indicator of the health of the plant. For orchids grown in pots we must be extra careful not to rot or smother the roots.

Because obtaining a good moisture balance is so very critical to optimal orchid care many orchid growers choose clear orchid pots so that it is easier to see when the roots are thriving and when they are not. It is believed that orchid roots engage in photosynthesis, which makes sense given that they grow exposed to dappled light as the orchid hangs from a tree, and clear pots make photosynthesis by orchid roots possible. White pots also allow some light to pass through them.

Pot your orchids in the smallest pot that the roots will fit in and stake the plant while it establishes itself. The orchids we've seen grow the best are often growing in what appears to be ridiculously small pots so resist the urge to 'pot up' any more than is absolutely necessary to hold the roots. Clear plastic pots make it easy to see the roots and to see when to water. The potting mix turns dark when wet and gradually lightens as it dries. White plastic pots also allow for some photosynthesis while being a very attractive choice for display as well. Unlike clay, plastic pots are easy to clean, disinfect, and reuse. Clear plastic pots are a great way to keep an eye on what is happening in the pot without having to disturb the plant. Exotic Ceramic Pots enhance the beauty of any orchid and are great for displaying a plant in bloom.

What about Orchid Fertilizer?



Orchids require special fertilizer designed for orchids to grow really well. A common ingredient in many off-the-shelf fertilizer formulas is Urea which is not well absorbed by orchids. As a result, it is best to obtain a fertilizer that is made for orchid care. The gold standard for orchid fertilizer is based upon a formula created as thamount on a regular basis is optimal for orchid care. Most orchid growers recommend fertilizing "weakly, weekly".

When watering flush the plants with water freely. Many people take orchids to the sink in order to flood them with water periodically. Our favorite saying is "once around the bench gets them damp, twice around the bench gets them wet, three times around the bench gets oxygen to the roots". It is oxygen to the roots that orchids need and they will get it from a combination of a good open mix and proper watering habits.


How does humidity and air movement affect orchids?


Orchids do not like 'wet feet' but they do very much like humidity. As a result, when grown inside a home orchids are often placed on humidity trays. These trays allow water to collect in the base while the plant is suspended above the water. Commercial trays are available or a tray can be created from a cake pan filled with stones or inverted pot saucers, anything to allow the orchid pot to be above a pool of water. In this way the orchid benefits from the evaporation of the water. Orchids also like to be gathered close together as this also helps to raise the humidity among the plants. This is invariably a balancing act because orchids also like air movement but constant movement of dry air will dry out the plants. Too much moisture and too little air movement and the plants may become susceptible to rot. Achieving a good balance of humidity and air movement is one of the goals of successful orchid care.

What are the light requirements of orchids?


Orchids have very widely varying light needs and understanding the appropriate amount of light for the type of orchid is essential to their care. Even 'high light' orchids do not require the kind of bright direct sunshine that a tomato plant does and even 'low light' orchids will not be happy indefinitely in the middle of a room far from any light source. Even a North window can be too little light for low light orchids to bloom reliably but a South window may need some shading. In fact, it is often inadequate light that inhibits orchid blooming. Some orchids, especially those which like high light levels, enjoy being summered outside in dappled shade and for many high light orchids that is the easiest way, to give them enough light to bloom. If high light orchids are to remain indoors, many will not bloom reliably without some sort of supplemental light unless they are in a very bright sun room or greenhouse. Fortunately, fluorescent bulbs with broad spectrum bulbs work fairly well with orchids, as do High Intensity Discharge (HID) lights. Also, in nature orchids get natural light cues. The days get longer and then get shorter. In our homes we have supplemental lighting and tend to keep a regular schedule year-round and this can throw off an orchid's natural clock.

What temperature do orchids require?



Some orchids use the chill in the Fall air or the difference between the temperature at night and the temperature during the day as a cue to let them know the seasons are changing and it is time to prepare to bloom. Again, the fact that many people prefer a fairly consistent temperature in their homes is at odds with the orchid's natural environment. That does not mean that all is lost, it is just to emphasize that knowing the needs of the type of orchid that you are trying to provide care for will allow y be rewarded with beautiful orchid blooms. Some orchids are naturally warm growing while others are intermediate or cool growing but most will do OK in intermediate conditions where it isn't blazing hot nor near freezing cold. It is good to know the temperate preferences of the orchids in your collection. Often there is some variance, for example, cooler growing orchids can be put closer to a cool window or in a cooler spot in a home.

How should orchids be watered?


Proper orchid watering is probably the single most difficult aspect of orchid care to get right. The appropriate amount of water for an orchid varies with the type of orchid, the type of mix it is in, and the environment in which the orchid is growing. This is as difficult for beginners as using a recipe that suggests that a dish be "baked until done", what does that mean? Orchids want the 'right' amount of water, not too much and not too little. The right amount also varies with the seasons, orchids dry out more quickly when it is hot then when it is cold. The key is to vary the frequency of orchid watering, the type of pot, the type of mix, how tightly the mix is packed and the amount of air circulation until the right balance is achieved for each orchid. This takes time and patience but pays off with increased health and vigor of the orchid which translates into increased blooms. The one thing to avoid is to limit the amount of water that an orchid is given during a watering. By & large one is met with the greatest success when an orchid is watered liberally, allowing the water to pour from the bottom of the pot, until the plant and media are completely saturated. From a practical standpoint this usually means bringing the orchid to the sink and running water liberally through the mix. In some cases one can water an orchid on its humidity tray especially if that tray has a drain in case the water level gets too high. Once the orchid has been watered it should go back to its growing space until the next watering which may be anything from a few days to a week or more later. Establishing a routine can help, for example watering on the weekend and checking the plants midweek. When in doubt, wait, too little is better than too much.

Any orchid mix can be over watered and lead to the demise of the plant. Most orchids like to get almost dry and then be flooded with water and allowed to get almost dry again. With sphagnum it is easy to tell when they are dry, the moss feels crunchy when you touch it. That's why many growers will recommend it to folks just starting out with orchids, especially phalaenopsis. Fir/coconut mixes can be hard to tell when to water as they hold more water in the center than we often think they do. Sticking a pencil or chopstick down into the mix and leaving it there allows you to pull it out and see if the interior of the mix is wet.

Help! My orchid is sick!




Often the first sign of a problem with an orchid's culture is an invasion of bugs or bacteria. Pull infected plants and move them away from others IMMEDIATELY!! Keep it away until treatment is complete. The best defense for fungus/bacterial infections is a good offense. We spray foliage monthly with Physan (1 teaspoon/gallon) as a preventative. Pick up an extra bottle of cinnamon in the spice section of your local grocery store and keep it near the orchids. If you cut on a plant, lightly sprinkle it with cinnamon because it is an effective bactericide/fungicide and it's safe to use. Spray with Physan mixed at 1 Tablespoon/gallon if infection sets in. For bugs we start with a GET OFF ME! cinnamon infusion and step up to a 50/50 rubbing alcohol and GET OFF ME! mixture. We like to put a cinnamon stick in the sprayer to increase the efficacy of the solution over time.

In some cases problems can 'go underground' and move from the leaves into the media and onto the roots. If you have a plant that just doesn't seem to recover it could be because trouble is hiding beneath the surface. In these cases repotting is a good idea and may be the only way to eradicate the problem for good. Sometimes orchids will develop an infestation of what looks like little fruit flies called fungus gnats. These are more than just an annoyance as they feed on tender orchid roots. Natural Fungus Gnat Control is just the ticket for these critters.

Note: If you suspect a virus infection, get the plant tested or destroy it. Most of all, keep it isolated until the verdict is in. Unfortunately, there is no way to visually identify virus from fungus or other damage and no way to cure virus once a plant becomes infected. Because of this, if you do acquire a virused plant it is best to destroy it before the virus is passed on to the rest of the collection.

Use the discovery of a problem to review the plant's culture. Orchids under stress are often very susceptible to bugs and disease in a way that stronger orchids are not. Is there insufficient air movement? Perhaps other plants have gotten the same insect on them? Was a new plant acquired and not quarantined long enough? Were several plants cut on by the same tool without sterilizing in between? Might a nearby house plant be a haven for bugs? Is there too much or too little light?

Some Important Tips for Rose gardening



It’s true that there are certain pests and diseases that hamper roses are simply prone to. At some point, every rose gardener will encounter black spot, Japanese beetles, rose chafers and mildew. Do not let that deter you from rose gardening. It is possible to control problems or to avoid them all together. It’s even possible to Rose garden organically. It just takes regular care and some gardening common sense. Everyone who is interested in planting roses should know that they do require a bit of care. 



Pruning Roses
 
Pruning rose bushes is intimidating to many gardeners, but actually very good for the plants. Becoming an accomplished rose pruner takes time and practice, but keep in mind that it is very hard to kill a rose with bad pruning. While there is a great deal of disagreement among rose experts regarding how and when to prune roses, it is generally agreed that most mistakes will grow out very quickly and it is better to make a good effort at pruning roses than to let them grow rampant.



Essential points for Pruning Roses:
 
  • Use clean, sharp tools
  • Look at the overall plant, but begin pruning from the base of the plant.
  • Prune to open the center of the plant to light and air circulatio
  • Make your cuts at a 45-degree angle, about 1/4 inches above a bud that is facing toward the outside of the plant.
  • Remove any weak or twiggy branches thinner than a pencil
  • If cane borers are a problem in your area, seal the cut with white glue, such as Elmer’s
  • Remove sucker growth below the graft.
  • Make sure it is a clean cut (not ragged)
  • Remove all broken, dead, dying or diseased wood (Any branches that look dry, shriveled or black. Cut until the inside of the cane is white.


    When to the Prune of Roses should be done?


    Timing is an important step for Pruning of Roses. Timing is determined by the class of the rose plant and the hardiness zone in which it is growing. Most rose pruning is done in the spring, with the blooming of the forsythia as a signal to get moving. If you don't have forsythia, watch for when the leaf buds begin to swell on your rose plants, it is meaning that the bumps on the canes get larger and reddish in color. Hybrid tea roses are the most particular about pruning. If you don't know what type of rose you have, watch the plant for a season. If it blooms on the new growth it sends out that growing season, prune while dormant or just about to break dormancy, as stated above. If it blooms early, on last year's canes, don't prune until after flowering. Pruning needs to be done at a specific time. Keeping in mind the type of rose plant and the area where it is growing is necessary in order to determine when to prune it. Most rose pruning is done right before the appearance of new buds in early spring.

    However, some varieties of roses also need to be pruned before winter sets in. After the rose gardener has determined when to prune roses, the next thing is to know the proper way of pruning them. It is important to use sharp and clean pruning tools. Sharpness insures you get a clean cut and don’t mangle the plant. Cleanliness minimizes the spread of any possible infectious diseases. When cutting it is also recommended to cut at a 45 to 50° angle and at an estimated 1/4 inch above a possible bud. During pruning, the first things that need to be cut off are the branches or canes that are diseased, damaged, weak or deformed. Next thing would be all the canes that grow towards the center and any possible suckers. The last would be any unnecessary branches or canes as to achieve the desired height and shape. Also, remember to leave four to five healthy canes in the center. Pruning can be challenging at first but if you know when to prune roses and have the right tools, you have half the battle won. Once you become more proficient at it, you might even find that you enjoy pruning and shaping this beautiful plant.
     
    Feeding of Roses:
    Roses are hungry feeders. You should fertilize with a food that is a little heavier on the phosphorus (middle number in the three). Improving the soil is recommended to increase the water and fertilizer retention. While species and shrub roses will make do with most any soil, Hybrid Teas need a highly fertile and organic soil to do well at all. Manure, mushroom compost, or any other highly organic additives are a necessity for a good Hybrid Tea rose. Good organic mulch will go a long way towards improving the soil fertility from year to year, as well as increasing water retention. DO NOT use wood chips or a poorly composted bark product. These require nitrogen to decompose and will rob your rose of nutrients. If you have been looking for a reason to start a compost pile, there is no better reason than mulching. Compost will actually add nutrients to the soil along with beneficial microbes. A quick scratch with a hoe will easily eliminate any weeds and keep the soil loose and fluffy. Roses detest any sort of competition so do not fall prey to the temptation of planting closely around roses. Dusting with rose powder is recommended for tea roses to keep off black spot and powdery mildew. These can be fatal diseases for your average Hybrid Tea rose, although not a big problem for your shrub and species roses. Many of the newer roses are bred specifically for disease resistance.
     
    Some Important Diseases Related to Rose Plant: 

     Powdery Mildew disease of Rose Plant:


    Identifying Symptoms:

    Powdery mildew, caused by the fungus Sphaerotheca pannosa, appears as a white powdery growth on rose leaves, stems, buds, or flowers. It usually first appears on new growth in periods of warm, dry days followed by cool, damp nights. The new leaves may become curled or twisted and the shoots may look badly deformed. The fungus may also infect older leaves. Often, the upper surface of the leaves appears normal, but there is extensive fungus growth on the underside of the leaf.

    Control Management:

    Although detailed information is lacking, some rose varieties are more resistant to powdery mildew. When planting new roses, find out from local rosaries which varieties are most resistant. The planting site can also be made less conducive to powdery mildew development. Do not plant roses in shaded spots, especially those areas that tend to dry out slowly in the morning. Surrounding hedges or shrubs should be pruned or thinned to allow for more air movement over the roses. Finally, a regular, preventive spray program with fungicides should be carried out.

    Black Spot disease of Rose Plant:

     
    Identifying Symptoms:

    The fungus, Diplocarpon rosae, produces round black spots with fringed margins on leaves or stems. On some varieties, yellowing may show up around the spots. These symptoms are often seen on the lower leaves first. Infected leaves will drop off and may leave the plant almost completely defoliated except for a few leaves that have recently grown at the tip of the canes. Such plants are badly weakened and may die over the winter.


    Control Management:

    As with powdery mildew, some varieties of rose are less susceptible. Select and plant resistant varieties whenever possible. The fungus survives the winter in fallen leaves. Raking and removing these leaves each fall may provide some control. Avoid watering the plants by splashing water on or about the leaves. Plant in sunny locations where plants will dry quickly after watering, rains, or damp nights (dew). Begin a fungicide spray program as soon as new leaves appear in the early spring.

     
    Stem or Cane Cankers disease of Rose plant:
    Identifying Symptoms:

    Several fungi cause stem cankers on roses. The different fungi cause slightly different looking cankers, but they usually produce brown, oval shaped, sunken or shriveled areas anywhere on the cane. When the canker completely surrounds or girdles the cane, the cane dies and the leaves wilt from that point outward. Sometimes small black specks of fungus spore forming structures can be seen erupting on the cane surface within the cankered area.

    Control Management:

    Always plant disease free material. Each year, prune out and destroy all diseased canes, making sure to cut well below the obviously cankered areas. Protect the plants from cold or freeze injury in the winter. This can be done either with mulch or another kind of cover. Keep the plants vigorous with proper fertilization, good watering practices, and black spot and powdery mildew disease control programs.

    Crown Gall disease of Rose Plant:
     
    Identifying Symptoms:

    Irregularly shaped, bulbous masses of tissue (galls) appear on stems near the soil line. These can appear as small swellings, or be several inches across. Severely infected plants become stunted and fail to produce acceptable flowers.

    Control Management:

    Avoid buying infected material with suspicious swellings or galls on lower stems or crowns. Protect plants from injuries on the stems. Maintain vigor with fertilization and watering. Pull and destroy badly infected plants. There is no chemical control for this disease.


    Mosaic disease of Rose Plant: 
     
    Identifying Symptoms:

    Rose mosaic is caused by a virus. Bright yellow patterns made up of wavy lines may appear on the leaves of some varieties. Other varieties may show no yellow lines, but may be stunted and weak due to virus infection.


    Control Management:

    Virus infected plants cannot be cured. Plant virus resistant roses if possible. Try to control insects, particularly aphids, since they help spread the virus. If you are pruning virus-infected plants, don't prune healthy plants unless you have disinfested your pruners. Pruners can be disinfested by dipping in a 10% solution of chlorine bleach in water. Severely infected plants should be removed and destroyed.

    Rosette and Witches Broom disease of Rose Plant:

     
    Identifying Symptoms:

    Rapid stem elongation may be an early symptom of this disease. Later on, certain branches of the plant will develop thickened, thorny stems. Many short, deformed shoots will form, often with red pigmentation and tiny misshapen leaves. These shoots give the appearance of a witches broom. Plants die within one to two years as symptoms spread from branch to branch.

    Control Management:

    The exact cause of this disease is unknown. Infected plants cannot be cured. Try to control insects, particularly leaf hoppers and plant hoppers. To protect other plants against the possibility of an infectious agent, symptomatic plants should be dug and discarded as soon as the disease is noticed.

    Rust disease of Rose Plant:

    Identifying Symptoms:

    Rose rust caused by the fungus, Phragmidium sp., appears as orange or rust colored growth on the underside of the leaves. Older leaves tend to show symptoms before younger leaves. Under favorable conditions rust can cover the entire leaf and stem of the rose plant. Severe infections can cause premature defoliation.

    Control Management:

    Whenever possible plant resistant varieties. Any practice that prevents the leaves from remaining wet for extended periods of time is beneficial for control. Never spray leaves with water in the evening so that the leaf surface is wet over night. Plant roses in areas that have full sun and allow air to flow freely around the plants. As a last resort, fungicides should be used.