I've given up on radishes. I've been trying for years to grow them without results. They just grow small and stringy.I know they don't like too much heat so how do I protect them.
I wouldn't think it would be to hot where you are. Root crops like the soil to be more on the loose side and not so compacted. Is your soil compacted?
Work the soil loose, mix in some composted manure and keep them watered, they should do just fine.