I planted Heliotrope in mid-June in an area that is dappled shade in the morning and full sun in the afternoon (approximately 4 hours). Even though they are only about 12 inches tall, many of the plants are flopping over and the stems seem really weak. Overall, the plants look relatively healthy, although a few have browned edges. What is causing this floppiness?

Generally, heliotrope enjoys at least 5 to 6 hours of sunlight per day. Try cutting your heliotrope back about 6 inches to promote lower, sturdier growth. You will delay flowering for 2 weeks, but the plants will benefit greatly.