You can grow radishes anywhere…but here, there or anywhere a pepper plant can thrive. Next question??? Sounds like the conversations that I have with myself when planting out. All those plan-zzzzzzzz. My radishes are in containers this season. Needed their in-ground space for pepper plants. They’re actually doing better in the 10 gallon containers than they do in-ground. Compost, cocoa coir and some greensand = Giant radishes!!! Hope your other half finds some radish room…somewhere.