> 9 weeks before FFD

By the time it goes outside, the plant should be 3˝ to 4˝ high, with 3 to 5 leaves and a stem diameter of about 1/8˝. Plant them out slightly deeper than they grew in the flats, to the depth of their first true leaves.

Broccoli prefers cooler temperatures and does best as a fall crop, growing and heading up best at about 65˚ F. It is also less bothered by pests in cool weather and the heads stay in peak condition for longer. Mature plants can sit in the garden, ready to harvest, for weeks. They are fairly hardy and can survive frost as low as 20˚ F.

Autumn Broccoli should be transplanted 9 weeks before the first fall frost date, so it is close to maturity by the time cold weather hits. If you are growing a lot of Broccoli for freezing, you should plant it at the optimal time, which is late summer. This also means you won't have to keep it frozen all summer.

Space saving alternative:

In warmer weather Broccoli transplants can be started in an outdoor nursery bed. This is better than direct sowing in that they don’t take up any bed space for the first month or two of their lives.

1. The seeds are sown in a small, protected area of soil, pricked out into a slightly larger area and finally planted out in the garden beds.

> 0-1 weeks after LFD

By the time it goes outside, the plant should be 3˝ to 4˝ high, with 3 to 5 leaves and a stem diameter of about 1/8˝. Plant them out slightly deeper than they grew in the flats, to the depth of their first true leaves.

Vernalization: In spring it is important to get transplants outside before they get too big. If their stems are over 1/4˝ diameter, they may be vernalized by cold temperatures. This happens when they are exposed to temperatures below 50˚F for two weeks and it will cause them to bolt as soon as it warms up. Of course you could just keep them inside until all risk of cold weather is past (or protect them with cloches or row covers). This is another reason Broccoli does best as a fall crop.

> Cold, Cool

Broccoli likes full sun, especially when growing in cool weather. It will tolerate some shade, but this slows maturation.

The large plants take up quite a bit of space, but this usually isn't an issue in cooler weather, as the garden is often half empty anyway.

> When outdoor temp: 40°F to 75°F, optimal temp 60°F to 65°F
> When min soil temp: 60°F

Broccoli isn't as hardy as most other Brassicas and seedlings shouldn't go outside until the soil is at least 60˚ F.

Spacing

12.0"-24.0", (1 per 2x2) plants per sq ft

The spacing you use depends on the fertility of the soil and how large you want the heads to grow. The wider the spacing, the larger the individual plants, (and their heads) can get. At 18" spacing, the heads may grow to be 6" in diameter. Closely spaced plants do not produce as many side shoots either.

12-18": Excellent soil or for small heads.

18": Good soil or for medium heads.

18-24": Poor soil or for large heads.

Transplant Outdoors

9 weeks before FFD

By the time it goes outside, the plant should be 3˝ to 4˝ high, with 3 to 5 leaves and a stem diameter of about 1/8˝. Plant them out slightly deeper than they grew in the flats, to the depth of their first true leaves.

Broccoli prefers cooler temperatures and does best as a fall crop, growing and heading up best at about 65˚ F. It is also less bothered by pests in cool weather and the heads stay in peak condition for longer. Mature plants can sit in the garden, ready to harvest, for weeks. They are fairly hardy and can survive frost as low as 20˚ F.

Autumn Broccoli should be transplanted 9 weeks before the first fall frost date, so it is close to maturity by the time cold weather hits. If you are growing a lot of Broccoli for freezing, you should plant it at the optimal time, which is late summer. This also means you won't have to keep it frozen all summer.

Space saving alternative:

In warmer weather Broccoli transplants can be started in an outdoor nursery bed. This is better than direct sowing in that they don’t take up any bed space for the first month or two of their lives.

1. The seeds are sown in a small, protected area of soil, pricked out into a slightly larger area and finally planted out in the garden beds.

Transplant Outdoors

0-1 weeks after LFD

By the time it goes outside, the plant should be 3˝ to 4˝ high, with 3 to 5 leaves and a stem diameter of about 1/8˝. Plant them out slightly deeper than they grew in the flats, to the depth of their first true leaves.

Vernalization: In spring it is important to get transplants outside before they get too big. If their stems are over 1/4˝ diameter, they may be vernalized by cold temperatures. This happens when they are exposed to temperatures below 50˚F for two weeks and it will cause them to bolt as soon as it warms up. Of course you could just keep them inside until all risk of cold weather is past (or protect them with cloches or row covers). This is another reason Broccoli does best as a fall crop.

Support

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