Frequently Asqued Orchid Questions - Orchid FAQ
The old leaves naturally turn yellow and fall off as new leaves are produced. If your new leaves start to turn yellow, the first thing to check is the amount of light your orchid is receiving (review the culture sheet for the genus/species of your orchid). If light is not a problem, then check to see if you orchid is being subjected to low temperatures. There are also orchids that will lose all of their leaves naturally like the Dendrobium nobile hybrids do and will appear to be a "dead stick.
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This is an indication of a fungal infection. Fungal infections are usually the result of warm temperatures, high humidity and low light levels. Treat the plants with a systemic fungicide such as Phyton 27.
Frequently Asked Questions
Nashville tap water contains approximately 1 ppm phosphate. Available iron will chemically combine with this phosphate forming a compound which is insoluble by the plants. An iron deficiency condition known as iron chlorosis may result in these plants. The plants turn yellow and the leaves and stems both become very brittle. Fertilizers containing iron supplements will correct this condition.
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The answer to this question depends upon which leaves are involved. Yellowing of old leaves on backbulbs is a normal part of the aging process. Therefore, this should not be of concern. However, yellowing of newer leaves is a sign of trouble. Orchids with yellow leaves are an indication that the plant is suffering from either too much light or insufficient feeding. Increase the shading and apply orchid nutrients as directed.
Frequently Asked Questions & Orchid Care
Lack of water or dehydration. The next step is to determine why the plant is not getting sufficient water. First, look to the roots. If the roots appear healthy, white or green and plump, and medium is in good shape, suspect underwatering, especially if the roots are white and the pot is very light. If, on the other hand, the roots are in poor condition, suspect root loss. If the plant has no roots, it cannot take up any water, no matter how much you give it.
Older leaves die - this is the orchids' trick to living indefinitely: they discard the oldest parts of the plant as they grow new shoots.
ODOM'S ORCHIDS -- FAQ
The simple answer: Lack of water or dehydration. The next step is to determine why the plant is not getting sufficient water. First, look to the roots. If the roots appear healthy, white or green and plump, and medium is in good shape, suspect underwatering, especially if the roots are white and the pot is very light. If, on the other hand, the roots are in poor condition, suspect root loss. If the plant has no roots, it cannot take up any water, no matter how much you give it.
Orchid Learning Center - Caring for Orchids
There may be some wide swings in temperature, where it may be too hot in direct sun, or the plant may be too close to an air conditioning or heating vent. There may be some fumes in the air caused by paint, natural gas leaks, or other chemicals. Flowers naturally create their own methane and collapse after pollination to save energy for seed production. Certain forms of methane or ethylene may trigger bud or flower collapse.
National Center for Home Food Preservation | Freezing FAQs
There are several ways to prevent darkening of fruit; use pure ascorbic acid or ascorbic acid mixtures. Citric acid or lemon juice may sometimes be used but are not as effective as ascorbic acid. Some fruits which are to be cooked before serving may also be steamed to prevent browning.
FAQs : American Clematis Society
Yellow leaves can be a symptom of overwatering or a mineral deficiency. Clematis need regular watering but is it is important not to let them become waterlogged. Clematis are heavy feeders. The ACS endorses Gro-Power Fertilizer because it is an organic soil conditioner as well as a fertilizer and it contains the necessary minerals to keep clematis healthy.
Pima County Master Gardener Frequently Asked Questions
Brown edges are often a sign of salt damage; the salt contents in our tap water can cause the damage and is often compound by insufficient water. Thoroughly water the plant (shrubs to 2 feet deep; trees to 3 feet deep to leach excess salts away from the roots.
Eartheart Naturals Inc.: FAQ
Commonly called tipburn, this could be due to excess fertilization, especially with perto-chemical fertilizers. Chemical insect sprays from aerosol cans can cause tip burning. A cold area, such as near windows or doors can also cause brown edges. Stop feeding with petro-chemical fertilizers and chemical insect sprays. Water well for 1-4 weeks depending on the plant and then resume feeding with Eartheart 18-16-9 All Purpose Plant Food or Eartheart All Purpose Insect Spray.
Black spots are endemic in a number of varieties of orchids, most notably those in the Oncidium or Oncidium family intergenerics. These spots are not a sign of disease. They cannot be removed, and will not spread from plant to plant. You can think of them as freckles. These spots are generally small and dry. If, however, your plant suddenly develops large black spots, particularly if they are moist, this could be a sign of disease.
Burnham Nurseries - Orchids - FAQ's
There are some deciduous orchids but generally orchids should not lose a lot of leaves at once. Some leaf loss of old foliage in natural, especially in autumn but excessive leaf loss will usually indicate that the plant has been kept too wet. Orchids do not like to be kept too wet, should not be allowed to stand in water and should therefore always be watered from the top and left to drain.
South Coast Orchids - FAQs
Try avoiding any Fumes and gases from stoves, automobiles, or cigarettes. This can also be a sign of stress due to low humidity or temperatures that are too high.