Symptoms
|
Cause
|
Corrective
measures
|
Plants tall, spindly and unproductive
|
Insufficient light
|
Move container to area receiving more light
|
Excessive nitrogen
|
Reduce feeding intervals
|
Plants yellowing from bottom, lack vigor, poor color
|
Excessive water
|
Reduce watering intervals; Check for good drainage
|
Low fertility
|
Increase fertility level of base solution
|
Plants wilt although sufficient water present
|
Poor drainage and aeration
|
Use mix containing higher percent organic matter; increase
number of holes for drainage
|
Marginal burning or firing of the leaves
|
High salts
|
Leach container with tap water at regular intervals
|
Plants stunted in growth; sickly, purplish color
|
Low temperature
|
Relocate container to warmer area
|
Low phosphate
|
Increase phosphate level in base solution
|
Holes in leaves, leaves distorted in shape
|
Insects
|
Use EPA-recommended insecticide
|
Plant leaves with spots; dead dried areas, or powdery or
rusty areas
|
Plant diseases
|
Remove diseased areas where observed and use
EPA-recommended fungicide
|