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Choosing your crops

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Getting the most from your plot

In this extract from The RHS Allotment Handbook, there's advice on how to choose crops that give you the maximum reward.

Obviously it makes sense to grow what you like on your plot, but this has to be tempered both by what is possible and by what lifestyle choices you want to make with respect to your allotment.

Growing nearly all your own

Where a degree of self-sufficiency is the aim, you might decide to go with the heaviest yielding crops. Brassicas and root vegetables are very productive, but peas, broad beans, and French beans less so. Leafy salads and greens will yield far more useful material than an equivalent area of plants that need to ‘head’ before you can cut them, like lettuces or cauliflower. Crops that only have a brief, late-summer season, such as peppers and cucumbers, may be tasty, but can be
the least productive of all.

When trying to achieve all-year-round supplies, there is a tricky period from early to mid-spring when few crops are available. There is a good case for buying imported or greenhouse-grown food at this difficult time. A diet of only spring cabbages, spring onions, turnip greens, spinach, and spinach beet (and in mild regions, cauliflowers) can be monotonous until the early-summer salads, peas, broad beans, and new potatoes arrive.

Grow something special

Some crops that are commercially grown and harvested, like carrots,
onions, or potatoes, are very cheap to buy. You may prefer to get these from the supermarket.

But if you hanker after black potatoes, purple or white carrots, or torpedo-shaped Italian onions (all delicious, by the way), you might have to search far and wide to buy them. There is also produce that requires hand labour: asparagus, leeks, spring onions, leafy salads, ‘Little Gem’ lettuce, and soft fruits. These are costly to buy, but very easy to grow yourself.

If your plot is some way from home, storable produce such as squash, pumpkins, root vegetables, and storing cabbages are valuable.  On the other hand, herbs that are needed as fresh as possible and in small quantities might be best grown at home.

The table below may help you decide what to grow: the right hand column contains veg that have a short season and may not be worth growing. 

Cheap & easy to grow,
expensive to buy
Cheap to buy but
take up much space
 Beetroot  Cabbage
 Broad beans  Carrots
 Brussels spouts  Celery
 Calabrese  Garlic
 Celeriac  Oniions
 Courgetts  Outdoor tomatoes
 French beans  Melons
 Herbs  Parsnips
 Leeks  Peas
 Lettuce  Potatoes, except early types   
 Mangetout peas  Pumpkins
 Mixed salad leaves  Squash
 Purple/white sprouting broccoli  Cauliflowers
 Radishes  Swedes
 Runners beans  Sweet potatoes
 Salad onions  
 Shallots  
 Spinach  
 Turnips  
 Soft fruit, all kinds  
 Rhubarb  

You’ve been reading an extract from The RHS Allotment Handbook. Buy your copy now for just £13.99 from the RHS Shop.

 

The RHS Allotment Handbook

The RHS Allotment Handbook

The advice on this page is from The RHS Allotment Handbook, priced at £13.99 in the RHS Online shop.

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Match your soil and crop  

Sandy soils are great for early crops, but suffer in a drought; clay soils grow abundant late and main season crops but warm up slowly in spring so that early crops are out of the question.

Pest & disease

Soil-borne pests and diseases can be a problem; three of the more serious examples are clubroot of cabbage family crops, white rot of the onion tribe, and potato cyst nematodes which also attack tomatoes.

Resistant varieties are available but growing crops that are not susceptible avoids disappointment, for example sweet potatoes, sweetcorn, squashes and French beans.