When is a dormant spray typically applied?

A dormant spray is typically applied in late winter or early spring when plants are still in a dormant state but beginning to experience the initial phases of bud swell. This timing is crucial as the conditions allow the spray to effectively target pests and diseases that may have overwintered without harming the plant itself, which is often less susceptible to damage during dormancy.

Applying the dormant spray at this time can help to control issues such as scale insects, certain fungal diseases, and other pests before they become active and more damaging as the growing season begins. This preventative measure ensures that plants are healthier and more robust as they enter the active growth phase.

This timing is critical as applying sprays too early, such as in the fall before frost, may not effectively address overwintering pests, and applying during active growth could stress the plants or interfere with pollinators once flowering begins. Thus, late winter or early spring is the optimal period for these treatments to maximize their effectiveness.