Markham Farm

Brassicas (broccoli, cabbage, etc.) can be planted out in Southern New Hampshire as early as six weeks before the first spring frost. As they should be started about 6 weeks before planting out, that's 12 weeks or 3 months before last frost. Last frost here is June 1, which means your brassicas should be started around March 1!

IMPORTANT: Nitrogen tends to be deficient in the soil while the weather is cool. So for early plantings of brassicas, please make sure to use a readily available fertilizer such as Neptune's Harvest (for organic gardeners) or Miracle Gro (for conventional gardeners) when you plant these out and once a week until temperatures are reliably above 50.