Broccoli

TL;DR: Broccoli is a cool-season brassica that thrives in spring and fall, often sweeter after a light frost. Start indoors 6-8 weeks before the last frost, transplant 18-24 inches apart in full sun, and mulch to keep roots cool and moist. Watch for cabbage loopers and fertilize with nitrogen mid-season. Harvest the central head when firm and tight, then enjoy weeks of smaller side shoots. It's rich in vitamins C and K, fiber, and cancer-fighting sulforaphane.

Broccoli is a cool-season vegetable that belongs to the brassica family, making it a close relative of kale, cauliflower, and Brussels sprouts. Known for its tree-like appearance with thick stalks and flowering heads called "florets," broccoli is a rewarding crop for gardeners who enjoy the crisp, earthy taste of homegrown produce. While many people only think of the central head, the leaves and even the stems are entirely edible and delicious. It thrives in the moderate temperatures of spring and fall, often becoming even sweeter after a light frost. When it's time to plant, timing is everything. Broccoli prefers to mature in cool weather, so it is often started indoors 6 to 8 weeks before the last frost for a spring crop, or sown in mid-summer for a fall harvest. When transplanting your seedlings, space them about 18 to 24 inches apart in a spot that receives full sun and has fertile, well-draining soil with plenty of organic matter. If you are planting in the spring, be sure to get them in the ground early enough so they can be harvested before the intense heat of summer causes the heads to "bolt," or open into yellow flowers. Maintaining your broccoli patch requires consistent moisture and a bit of protection. These plants have shallow roots, so regular watering is essential to prevent stress, which can lead to tough, bitter stalks. Applying a layer of mulch helps keep the soil cool and moist. You should also be on the lookout for the common cabbage looper—a small green caterpillar that loves to munch on the leaves; using a lightweight row cover can be an effective, chemical-free way to keep these pests away. Because broccoli is a "heavy feeder," a boost of nitrogen-rich organic fertilizer mid-season can help produce larger, healthier heads. Harvesting occurs when the main central head is firm and the flower buds are tight, usually reaching 4 to 7 inches in diameter. Use a sharp knife to cut the stalk at a slant about 5 to 6 inches below the head. One of the best things about growing broccoli is that once the main head is removed, most varieties will continue to produce smaller "side shoots" for weeks, extending your harvest. Beyond the garden, broccoli is a nutritional giant, famously high in vitamin C, vitamin K, and fiber. It also contains potent antioxidants and sulforaphane, compounds that are widely studied for their ability to support long-term cellular health.