Broccoli Gardening Tips: Broccoli needs cooler weather, full sun, water and rich soil. Your broccoli should have least 6 hours of sun daily and have well-drained, moist soil with plenty of organic matter. Mulch will help keep the ground moist.The soil pH should be between 6.0 and 7.0 for best growth. Improve your soil by mixing in fertilizer. Broccoli likes moisture to grow fast and produce well, so water regularly, applying 1 to 1.5 inches of water per week if rain doesn’t cover it. Broccoli plants should be 18 inches apart if planted in rows. No more tips guys! I am out of characters now!