All three of these delectable sweet peppers start out green and then sweeten as they transform into their ripe color, although delicious at any stage. Heirloom 'Yolo Wonder' (red color seeds) turns bright red and is resistant to tobacco mosaic virus. 'Coral Belle' (natural color seeds) turns intense orange, and 'Canary Belle' (yellow color seeds) turns a brilliant yellow. These 3½"–4" hefty peppers grow well in containers too.