Bloomsdale Longstanding spinach was selected for slow bolting plants and good flavor. The deep green leaves make a tasty salad or spinach smoothie. Whip up a mushroom stuffing dip with chopped spinach, mozzarella, olive oil, and a touch of cayenne pepper. Start directly in the soil when soil temperatures reach 50 degrees. Plant every 7 days for prolonged harvest. 40 to 47 days.