Your garden is amazing! You always amaze me. Lettuce growing in the snow. This is one time I dare to ask "What next?" (the most dangerous question: I've learned not to even THINK it.)
Have you tried the kitchen-scrap method of planting?
I got carrot and celery tops to grow but you know WHAT NEXT: bunnies ate 'em all before they ever got close to proving they were viable.
This video -