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Brussels Sprouts Seeds - Darkmar

Botanical - Brassica oleracea


Seed Count:
400 Seeds
Usually despatched within 24 hours
See "Delivery Charge" tab below
Price £1.66

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400 Seeds.

Other Names - Sprouts, Brussel Sprouts…

The Bedford Darkmar 21 is a mid to late season variety producing a heavy crop of medium to large sized dark green brussels sprouts over a long period. Harvest from late autumn onwards. Brussels sprouts are at their most delicious when lightly cooked, steamed, boiled or added to stir fries.

  • Produces large dark green brussels sprouts.
  • Ready to harvest in late autumn, ideal for the Christmas table.
  • Produces sweet tasting sprouts over a long season.

Suitable For - Vegetable plot, raised beds

Sowing Months - Late March - mid May

Harvest - November - January

Gardening is about finding the right balance! Try growing Companion Plants close by to help deter pests.

  • Growing a ground covering crop such as clover around the brassica plants helps to prevent the cabbage root fly laying its eggs at the base of the plants.
  • Cabbage white butterflies are drawn to nasturtiums. Try growing these flowers close by as a sacrificial plant. They will help to draw the pest away from the brassica crop.
  • Calendula (Pot marigold) attracts predator insects such as lacewings, ladybirds and hoverflies who love to feast on aphids.
  • White mustard can help to draw the flea beetle away from the crop as the pest normally favours this leaf. Mint can also help to deter the flea beetle.
  • Low growing Limnanthes helps to keep the surrounding soil moist, supresses weed growth, attracts bees, hoverflies who's larvae feed on aphids and can be dug in as green manure to add organic matter to the soil.

Soil Preperation

The soil must be fertile and moisture retentive. Add a good amount of well rotted manure or compost a few months before sowing or planting (The previous autumn is ideal). Lime if necessary as brassicas prefer alkaline soil.

General InformationSowing & Planting Information
Habit Biennial, grown as an annual Module Grown & Transplants
Type N/A Distance between plants 55 cm
Position Full sun, sheltered Distance between rows 60 cm
Average height 80 cm Direct Sowing
Average spread 45 cm Sowing distance between plants 3 cm
Hardiness Fully Hardy Distance between rows 30 cm
Overwintering Yes Sowing depth 1 cm
Soil Ph 6.5 - 7.5 (prefers alkaline soil) Germination temperature 10 to 20℃
    Days to germination 7 - 14 days

Sowing Guide

Early Sowing/Module Sowing

Sow 2 seeds per 4 cm module in late March to mid May. As soon as germination starts the plants will need less heat and as much daylight as possible. When the seedlings are big enough to handle thin out to one strong seedling per module. 2 - 3 weeks later plant out at the distance suggested above (harden off first over 7 - 10 days).
When planting out set the plants about 2 - 3 cm deeper into the ground to what they were growing in the modules. Firm the soil around each plant as brassicas dislike loose soil. Water well and cover with fine insect mesh.

Direct Sowing

When direct sowing brussels sprouts it is best to start them in a well prepared seed bed, then in a few weeks the young plants can be transplanted into their final position. Sow 1 seed every 3 cm at the depth and row distance suggested above. Cover the seeds with soil and water well. To avoid problems from brassica pests cover the crop at this stage with fine insect mesh.
When the seedlings are big enough to handle thin to 9 cm between each plant, keep the strongest plants, discard the weak. The young plants will be ready to transplant into their final growing position when they are 8 - 10 cm tall. Water the plants well the day before transplanting to help reduce stress. Transplant at the distance suggested above.
When transplanting set the plants about 2 - 3 cm deeper into the ground to what they were growing in the seed bed. Firm the soil around each transplant as brassicas dislike loose soil. Water well and cover with fine insect mesh.

Growing On

Hoe regularly to keep weeds under control. Water well especially in dry weather. The plants will benefit from a mulch of compost to help keep the soil moist during hot summer weather. Keep an eye on pests. Prevention is key, it is highly recommended to grow all brassicas under fine insect mesh especially during the summer months as pests can spoil a heathy crop in no time.
In autumn ensure the soil around the stem is firm, earth up the stems by about 10 cm with surrounding soil and firm down well. This will help to prevent the plants falling over in high winds and heavy snow. If tall varieties are grown and especially if the location is unsheltered, in autumn add a few stakes nearby to help support the plants. If growth is slow add some extra general purpose fertilizer in early autumn.
If fine mesh is used ensure the mesh does not touch the plants otherwise pests such as the cabbage butterfly will lay its eggs through the mesh.


Sprouts form very slowly on the stem. The lowest sprouts are normally poor in quality and it may be best to remove them before they reach maturity along with any yellowing leaves. Harvesting can begin when the sprouts at the base of the stem have grown to just under walnut size, they should be firm and the sprout leaves should be tight. Snap the sprout off with a sharp downward tug or if preferred cut with a sharp knife. Start harvesting from the bottom of the stem as these sprouts will be the largest, steadily working up the stem with every harvest.
It is recommended to remove any yellow leaves so that the crop is not spoilt when the leaves droop down and start to rot. When all the sprouts have been harvested cut the cabbage like 'sprout top' off the stem and use like a cabbage. Before composting chop the stem into small pieces otherwise it can take a long time to compost.


Sometimes birds especially pigeons get a taste for the leaves. To protect, cover the crop with mesh or bird netting. Ensure the mesh does not touch the plants otherwise the pigeons will simply land on the mesh and eat the plants through it.

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(Including Northern Ireland, the Highlands & Islands, Scilly Isles, Channel Isles and the Isle of Man). Delivery charges to these areas are the same as UK mainland stated below (with no additional surcharge). Delivery however may take longer than the times stated due to weather, distance etc.)

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STANDARD DELIVERY - Royal Mail 2nd Class (3 - 5 working days) - £0.95

For orders under £9.98, the "Standard Delivery" charge will be added automatically at checkout.

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