Continue to water plants as needed to maintain moist soil. Weed the area frequently to eliminate competition for nutrients and moisture. Repel caterpillars with a biological pesticide such as nontoxic Bacillus thuringiensis or hand-pick the pests and drop them in a bucket of soapy water.
Harvest Tips
Broccoli is ready for harvest when the head is tight and firm. Harvest before any buds open to reveal yellow flowers, which indicate the broccoli is past its peak (although still edible). Cut the stems at an angle to reduce the likelihood they will rot. Continue harvesting smaller side shoots as they develop.