Drench with a broad-spectrum fungicide at planting. If they go out of bloom during hit weather they can be cut back to re-bloom in the fall. Faster flower response with long days. Occasionally aphid and thrips are problems. 500 ppm two weeks apart with the first spray applied as soon as plants are established in the final container.
Powdery mildew is the most significant foliar disease.
Growers used to injecting 200 ppm will likely end up underfeeding these crops. A potential remedy is to supplement these heavy feeders with slow release so they do not need to set up a separate feeding program just for these items. 1.0 oz per gallon yields 300 ppm. Iron chelate supplements - because iron is an immobile element, deficiency symptoms are seen in the younger growth first. Green veins with the tissue between veins turning yellow may indicate an iron deficiency.