Why Your Watermelons Won’t Sprout: The Hidden Thermostat in the Soil
Your watermelons are counting soil temperature, not calendar days. They refuse to germinate below 70°F but panic above 95°F. Sweet potatoes do the same math. Plant now in Zone 8-13 and they’ll establish roots before summer heat locks them out. Soil Temperature: The Real Start Signal Watermelons and sweet potatoes care more about soil warmth … Read more