Hit the seed racks. Carefully read the back of the packet. If it says the plant is ripe in 120 days, leave it there. Plant for 90 days and hope we get more frost free days. There are always new varieties of flowers and vegetables coming out. Live a little and plant a flower you have never planted before. Try a purple carrot or an orange tomato. Or just for the heck of it, plant a hill of warty gourds or pumpkins. Have fun gardening this summer.