9/18/2026
Rain Barrels That Work All Season: Sizing, First-Flush, Freezing, and the Water Rules Worth Knowing
One barrel under a downspout can water a surprising amount of garden, but only if you get the few rules right. This plain guide covers how much water a barrel really holds, the first-flush habit that keeps the water cleaner, how to keep mosquitoes and algae out, and how to drain it so the barrel survives the first hard freeze. It also covers the one honest limit you need to know about watering food with roof runoff.