Too Much Fertilizers?
Excessive fertilizing generally boosts growth initially by favoring the development of large, deep green foliage. But it produces problems later. Leaf tips on newer growth begin to brown or burn, after which older foliage begins to turn yellow, burn and fall prematurely. Salt damage to the root system renders water unavailable to the developing roots. These dangers are especially applicable to peat-based potting mixes and rockwool. Plants may rot and die rapidly. Reducing fertilizer applications, removing the upper crust of the growing medium and leaching excess salts corrects the condition.
