By planting cauliflower seeds you can harvest fresh heads from your garden all season long. Fresh cauliflower has a beautiful crisp texture, perfect for the dip tray. Try the orange, purple, and green cauliflower varieties to kick it up a notch. Cauliflower is also finding new popularity as a roasted or mashed vegetable. Cauliflower seeds can be planted in spring through summer for a long harvest period. In 60 to 70 days the cauliflower is ready for the table.