Herbicide toxicity on mandevilla
Calcium deficient bougainvillea
Calcium deficient dieffenbachia
WEAK, THIN NEWER LEAVES
Cause and Notes: • This means the plant is likely not making good, sturdy cell walls • Lack of calcium is often the cause • Low light levels will often contribute to or aggravate this symptom • Can also be caused by herbicide injury
Examples: • Seen on philodendrons, many hanging basket varieties, even cannabis
How to Correct: • Sprays with calcium nitrate, Harrell’s MAX® Calcium 8.25%, or chelated calcium will often help • Some plants respond to foliar silicates as well • Harrell’s MAX® Potassium Silicate is an excellent source, which may also help with disease and insect resistance
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