The hardiest cabbage-family crop, Brussels sprouts survive freezing temperatures better than hot spells. Time your plantings so that overnight fall frosts will bring out the sprouts' sweetness. You'll find that you'll plant this crop quite late, after you've set out warm-season crops like peppers and squash. To determine the timing of planting, count back the number of days to maturity from your first fall frost—that's the date to set transplants in the garden. In mild-winter areas, time the crop for a winter-to-spring harvest.
To start your Brussels sprout plants from seeds (indoors or out), sow seeds 1/2 inch deep. When seedlings are 5 to 7 inches tall, space or thin them to 2 feet apart. Set transplants deeper than they grew originally, with the lowest leaves just above the soil. Firm the ground around the plants, and water well.
Related: Cabbage Is One Of The Easiest Vegetables To Grow In Your Garden