Growing

Sunlit timber greenhouse interior with tomato plants on a hot summer day

How to Keep a Greenhouse Cool: the UK Summer Guide

— Waldenhaus
Tagged: growing-guide summer troubleshooting ventilation
By 11am on a warm Saturday a closed 8x6 greenhouse can sit at 35°C. The three moves that bring it back down: the RHS 20% vent rule, shading compared, and a 10-minute heat-day routine.