What are the common problems in orchid cultivation and management?

OrchidsCultivationCommon problems in management

I. Problems common to mostorchids:

a. Leaves:

1. Leaves dark green, outwardly healthy, but the plant does not bloom; this may be insufficient light. Check the light level and increase the amount of light.

2. Leaves lack luster and eventually wither; the plant is not absorbing enough water. Check the root system. If the roots are growing vigorously and look healthy and firm, it means the plant is short of water. If the roots are unhealthy, repot as soon as possible. 3. Leaves gradually yellow; too much light or not enough nitrogen fertilizer.

4. Clear water-soaked spots appear on the leaves, usually a bacterial infection; repot and treat with a fungicide. 5. Upper leaves or leaves in sunlight curl and turn white; sunburn, light too strong.

6. New leaves sunken; tissue collapse caused by water temperature too low or air temperature too low.

7. Leaf tips turn black or brown; root system withers; too much fertilizer causing salt damage. Check the fertilizer formula and leach at least once a month. When the plant is overly dry, give water but do not give fertilizer at the same time.

8. Leaves turn yellow, then brown and die; fungal damage, too much watering, growing medium too wet and breaking down, relative humidity too high, temperature too low. Treatment is to use a fungicide, cut off dead or brown leaf parts, and repot. The root system should dry completely before watering again.

9. Black streaks appear on the leaves; caused by a virus.

b. Newly grown leaves:

1. Grow fast but soft; too much nitrogen fertilizer.

2. New leaves small in area, growth stunted, or unable to grow upward; the plant is under stress: weak root system, insufficient light, temperature too high, nitrogen deficiency, etc.

c. Flower buds, flowers and flower spikes:

1. Flower buds turn yellow and then drop; temperature too high, light too high or too low, relative humidity too low, watering unsuitable, trace element deficiency, weak root system, etc.

2. Flower buds fail to open fully; genetic trait, temperature too low, relative humidity too low, thrips damage. 3. Flowers too small, color less vivid than before; insufficient light or temperature too high.

4. Flowers wilt quickly; temperature too high or too low, exposure to direct sunlight, relative humidity too low, insufficient fertilizer or trace elements, improper watering, poor root development.

5. Too few flowers; plant weak, light too low, lack of phosphorus fertilizer (P).

6. Brown spots or mosaic patterns appear on the flowers; caused by a virus.

7. Poor flower arrangement; the angle of the pot was changed during the spike-emergence stage.

d. Roots:

1. Roots turn black or brown; root system damaged, harmed by root rot fungi; the damaged roots should be removed. 2. Root tips have bite marks or are missing; eaten by insects.

3. Root tips die; salt accumulation from poor water quality, too much fertilizer, not enough leaching, etc. 4. Roots deformed; chlorine deficiency.

5. Poor root development; trace element deficiency.

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