Sowing lettuce seeds for Fall crop
Hello, I am planning on sowing lettuce seeds outdoors at the end of July for a fall crop. The recommendation for planting butterhead is July 20-Sept 1 for central Maryland. My question is - if July and August are 90 degrees everyday and the lettuce seeds need around 70 degrees for germination, will the 90 degrees burn them out? Or will the night time temperatures (which are lower) aid in germination? Will the seeds and seedlings be ok in the heat if directly sown outdoors? Thanks!
For a fall crop, sow seeds in late summer. It may be necessary to protect lettuce from the last of the summer’s heat so they will germinate and thrive. Shade cloth and floating row covers will help to shade summer grown lettuce from direct sunlight and high temperatures. Be sure to keep well watered.
See our lettuce profile for more tips. http://extension.umd.edu/growit/vegetable-profiles-lettuce