How to Grow Beets: Complete Guide with Photos ~ Homestead and Chill Sedum in mailbox planter turns bright red pink after heat wave Bloom Where You Are Planted Metal Sign Lone Star Art. Plant onion seeds indoors for a head start! Onions have a long growing season, and sowing onion seeds indoors will give you a leg up, which is particularly helpful if you live in a cooler climate. Airplant Care Guide