| When to Start
Broccoli seeds are best started indoors 7 to 9 weeks before the last frost, at a temperature of 70 to 75 degrees F. They can also be sown outdoors 2 weeks before the last frost. For a winter crop in zones 8 and warmer, sow in late summer. Expect germination in 10 to 14 days.
The same guidelines apply to Cauliflower, except when starting indoors, sow your seeds 5 to 7 weeks before the last frost. Expect germination in 8 to 10 days.
Since Cauliflower is more sensitive to cold than its cabbage-family relatives, you need to start it early enough that it has a chance to mature before the heat of the summer. Be careful, however, not to start it so early it gets damaged by the cold.
How to Start
Sow your Broccoli and Cauliflower seeds at a depth of 4 times the size of the seed, or ½ inch deep, and water thoroughly. Once the seeds have sprouted, be sure to keep the soil lightly moist.
Make sure the plants receive plenty of light - fluorescent light for around 14 to 16 hours a day is also ideal for the fastest growth. You will want to keep the seedlings just a few inches below the light so they don't "stretch" and get "leggy". If you don't have fluorescent lighting, a south-facing window will do just fine.
Broccoli - 45 to 60 days from sowing to harvesting
Cauliflower - 30 to 80 days from sowing to harvesting
Planting Out
Oftentimes garden shops will have "starts" or "sets" of early spring vegetables that you can purchase. This, imho, is a very valuable service as many people are not set up to start plants indoors or get ill & forget to water their seedling so they all die :(
Garden shops will often have only a few (or ONE) varieties of each vegetable & they are usually much, much more expensive than starting your own from seeds.
Transplant your Broccoli and Cauliflower seedlings when they have at least two sets of true leaves. This should be done about 2 weeks before the last frost. Site them in full sun in a rich, moist, well-drained soil, spacing the young plants 18 to 24 inches apart in rows that are 2 ½ to 3 feet apart, or in 4 to 5 foot wide garden beds 18 to 24 inches each direction.
Feed both your Broccoli and Cauliflower with a low nitrogen fertilizer when first planting out. For your Broccoli, fertilize again when the plants are 6 to 8 inches tall, 12 to 15 inches tall, and then when the buds first form. For your Cauliflower, fertilize again every 4 weeks. Keep the seedlings well watered and mulched to retain moisture and keep the roots cool.
Special Considerations
If your seedlings have been held too long or mistreated in some way before planting, they can create "buttons", or small heads, that tend to flower prematurely.
Climatic elements such as extreme cold and drought can cause your plants to halt their full growth and form only "buttons."
Don't allow your transplants to get too mature before moving them to your garden. If you do, they may become stressed by transplant shock.
A starter fertilizer applied when you transplant your seedlings will get your Broccoli and Cauliflower off to a good start, but it will not compensate for all the possible problems just mentioned.
Beets, Onions, and Garlic are all good companions for your Broccoli and Cauliflower.
Broccoli & cauliflower come in many varieties now. Try some of each to add variety to your dinner plate!
    
(L to R: broccoli, cauliflower, purple cauliflower, cheddar cauliflower, romanesci broccoli)
Growing Tips
~Broccoli - once the head is fully developed, but before the individual flowers start to open, cut the central head along with 5 or 6 inches of stem. Removing the central head will stimulate development of the side shoots, which will allow you to continue your harvest for several weeks.
~Cauliflower - the heads (curds) develop quickly under proper conditions, typically growing to 6 to 8 inches within 7 to 12 days after branching begins. Harvest the mature heads (they should be compact and firm) by cutting the main stem. If the heads develop a coarse, "ricey" appearance, they have over-matured. Cauliflower does not typically have side shoots, so you can compost the plants after the heads have been harvested.
~Store fresh, unwashed Broccoli in your refrigerator's vegetable crisper for 3 to 5 days. Put it in a loose or perforated plastic bad, being sure not to store it if it's wet - wet Broccoli will quickly become limp and can get moldy. Its best flavor and nutritional value will be maintained if storage is brief.
~Uncooked Cauliflower can be stored in a paper or plastic bag in the refrigerator for up to a week. Place it stem side down to keep moisture from collecting in the florets.
Pests and Problems
Aphids are often found on the underside of leaves. You can wash them off with a strong stream of water or use an insecticidal soap (be sure to follow the label instructions). Check the plants regularly, as aphids can be a recurring problem.
Cabbage worms tend to attack the leaves and heads of related cole crops. Cole crops are crops that belong to the mustard family and have similar cultural requirements. They're hardy plants that prefer cool weather. The most commonly grown cole crops are Broccoli, Cauliflower, Brussels Sprouts, Cabbage, Kale, Collards, and Kohlrabi.
There are three species of cabbage worms - imported cabbage worms, cabbage loopers, and diamond back moth worms. They're very destructive to plants, as they have a voracious appetite. Covering the plants with screening or a row cover can prevent the presence of these pests.
Fun Facts
Are Broccoli Florets Actually Flowers?
Yes! Broccoli bears a type of inflorescence called a raceme. It is unbranched and bears "pedicillate" flowers, which means that the flowers are carried on short stalks called pedicals, with the oldest flowers toward the base and the youngest at the growing tip. This creates the dome-like look of broccoli stalks.
We eat broccoli when the flowers are still in bud. If broccoli is left too long in the garden, the green buds will burst open into yellow blooms.
be sure to see all the posts in this series for more info! |
