Start cauliflower indoors by seed 10 weeks before your last frost date. Plant the seeds 1/4 inch (6.35 mm) deep in your seed starting mix.

Make sure to give the seedlings lots of light under your grow lights or in a bright sunny window.

Transplant the seedlings into your garden 4 to 5 weeks before your last frost date. Spacing the plants 18 to 24 inches (45.72 to 60.96 cm) apart. Make sure to provide them with protection from cold weather and frosts.

Cauliflower is a heavy feeder, make sure to plant it into rich fertile soil that’s been amended with compost.

At the time of planting fill the hole with liquid fertilizer before placing the seedling inside. Fertilize the plants again 1 month after planting with liquid fish emulsion or your favourite garden fertilizer.

Water your plants consistently providing 1 inch (2.54 cm) of water each week if you haven’t had enough rainfall. Mulch around the plants to help keep the soil moist and suppress weeds.

When you start to see small 2 inch (5.08 cm) cauliflower heads forming it’s time to blanch them (white varieties only). Take a few of the large outer leaves and tie them together over the top of the plant.

Harvest cauliflower when the heads are 6 to 8 inches (15.24 to 20.32 cm) wide or according to your seed package information. This will be about 7 to 12 days after you start the blanching process. Cut the head off the plant leaving a few inches of stem attached.