Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant outside
Harvest
Showing schedule for Southern England in United Kingdom

Soil facts and preparation

Quick facts..

  • Soil Type Fertile and Well Drained
  • Ideal Ph range 6.5 to 7.5
  • Site Full Sun
Dedicate a sunny spot that will be undisturbed for a few years. The soil should be well drained, Asparagus will not grow successfully in clay or waterlogged soil.

Start of your asparagus plot by digging in plenty of organic material several months before planting and then adding a general purpose fertilizer a week or two before planting.

Note that Asparagus can be grown salty soil and is often found growing in coastal regions. Salt can even be added to the site which will prevent weed growth

Sowing and planting

Quick facts..

  • Germination 12 to 20 days
  • Sow 100mm deep
  • Sow Spacing 300mm
  • Rows 300mm apart
Asparagus can be grown from seed but is more commonly grown from immature plants known as crowns.

When growing from seed, rake the seed bed to a fine tilth and sow thinly in rows 30cm apart at a depth of 5cm. Gradually thin to a final spacing of 30cm. If you have bought seed that produce both male and female plants then you will have to remove females, identifiable from their berries.

When planting crowns dig trenches 30com apart, 20cm deep and create a mound of soil 10cm high running down the middle. Gently lay the crowns on the mound of soil 30cm apart and spread out roots. Initially cover with 5cm of finely sieved soil. As the plants grow gradually add soil until the trench is full.

Growing a bumper crop

Keep soil moist by watering regularly especially in dry weather. The plot should be kept weed free, avoid damaging shoots when hoeing. Avoid the temptation to harvest spears from immature plants, doing so will weaken and possibly kill the crowns. Let the plants grow unhindered for the first two seasons.

Harvesting the fruits of your labour

Quick facts..

  • Yield 420g per plant
You can expect to harvest approximately 20 asparagus spears per plant. When the spears grow above 10cm tall cut them with a sharp knife 5cm below the soil surface (giving you a spear 15cm in length) and cover the stump with soil.

Cut regularly, making sure the spears do not get too large for a period of 6 weeks before leaving the foliage to develop ready for next season.

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Asparagus varieties

Backlim

All male F1 hybrid. Produces good yields of thick spears with well closed tips mid to late season. Good candidate for growing as white asparagus. Backlim has become the variety of choice for growing under glass or in poly tunnels. High resistance to hollowness, pink discolouration and rust. Awarded the RHS Award Of Garden Merit.

Connovers Colossal

Large early maturing variety with good flavour. Plants are reported to produce exceptionally high yields Popular variety with gardeners and commercial growers it has bright green spears with purple tips. Connovers Colossal has been awarded an Award of Garden Merit by The Royal Horticultural Society