Harvesting Zucchini

Zucchini have high water needs throughout their growing season. Water deeply and consistently, aiming for the soil rather than the leaves to minimise fungal problems. In dry weather from June to September, this typically means a thorough soak two or three times per week; in hot spells, daily watering may be necessary. Inconsistent watering causes fruit to abort or develop bitter flavours, so mulching with compost or straw helps retain moisture and regulate soil temperature. Feed generously. Zucchini are hungry plants, and regular feeding from April through July keeps them productive. Apply a balanced general-purpose fertiliser or liquid tomato feed every two weeks once flowering begins, or side-dress with well-rotted manure or compost monthly. Potassium-rich feeds (such as comfrey tea or tomato fertiliser) support heavy fruiting. Overwintering is not applicable; zucchini are frost-tender annuals that will be killed by the first autumn frost. Clear spent plants in October or November and compost them unless they show signs of disease. Powdery mildew is the most common problem, appearing as white patches on leaves from mid-summer onward, especially in humid conditions or where air circulation is poor. Remove affected leaves promptly and avoid overhead watering. Slugs and snails can devastate young plants; protect seedlings with barriers, beer traps, or organic pellets. Aphids occasionally cluster on shoot tips; squash by hand or spray with soapy water. Blossom end rot—dark, sunken patches on fruit—indicates calcium deficiency or erratic watering rather than disease; maintain even soil moisture to prevent it.