Greenhouse Spaghetti Squash Blossom Drop: Pollination and Water Management

Introduction

Greenhouse squash often drop blossoms due to lack of pollinators and water issues.

Hand-Pollinate with Brush in Greenhouse

Transfer pollen from male to female daily (female has mini-fruit at base).

Avoid Overwatering

Water deeply once weekly.

Use Low-Nitrogen Fertilizer

High N = foliage, no fruit. Tomato fertilizer (high P/K) works for squash too.

Deep Weekly Watering and Mulch

1.5 inches/week, mulch to retain moisture.

Conclusion

Hand-pollinate daily, water deeply weekly, feed low-N fertilizer for greenhouse squash success.