This year, one of the lettuces I grew is called Santoro, a type of butterhead lettuce that is heat-resistant, cold resistant, has a wonderful taste and grows really big if given the chance. I got the seeds from Cooks Garden seed catalog. I started them inside the house on Jan 29, transplanted them into 2″ pots on Feb 14 and transplanted them again into the greenhouse in mid April. I read somewhere Santoro lettuce can produce 12″ heads if you give them the room. So I spaced them really far apart to see if they could get that big. They say if you crowd big varieties they will never reach their maximum size. In the picture above I’ve picked the outer leaves to eat and wanted to see if they would grow back. The heads on the right haven’t been touched yet. As you can see I picked pretty hard. They grew back almost to the same size as the ones that weren’t picked.
A couple of weeks later-Check out the size of these heads-a full 12 inches across. They are still growing in the greenhouse but now I’m picking the whole head (instead of just the outer leaves) as I had to make way for the tomatoes that will grow in there. In fact I already have all 18 tomato plants (in wall of waters) inside the greenhouse as of May 13. I know it will get too hot for lettuces inside the greenhouse this summer so I’m starting to pull them to eat.
May 31-I just picked this last head of Santoro lettuce yesterday (shown above between the tomatoes in the wall of waters) and it hadn’t bolted yet even though the temperatures in the greenhouse have gotten over 80 degrees. It’s handled 19 degrees to over 80 degrees! It reached 17 inches across! Hasn’t gotten bitter and is still soft and wonderful to eat. I’ve never had such great lettuce as this year, not only with this lettuce but with all of them in the greenhouse. Seems I’ve figured out how to be successful with them. I’ve done a lot of research on them from Nov-Dec to find some great varieties that were cold tolerant and now I’ve researched out what varieties of lettuce are heat tolerant, hoping to grow them in the shade this summer here in Santa Fe without bolting. Most of us don’t even try to grow lettuce in the summer as it is pretty warm here. I will list the heat tolerant varieties of lettuce in the next post and do an experiment with some of them outside in the garden.