| Any chance you could convert a portable cold frame into a hot frame -- dig a 6-inch trench in the garden or raised bed, layer in 6 inches of fresh or near fresh horse or cow manure -- cover with an inch of sand, place the frame over the bed -- you now have hot frame that will be 20F warmer than the outside temp. You can grow on your seedlings in pots until transplant out time. It's an old Paris-market garden trick. |
Here is a link that might be useful: HarvestToTable.com