Fletching Glasshouses

One of the delights of social media is that it’s quite easy to incorporate information from one place into another. Our vegetable production arm has its own web site which is all about Organic Vegetables in East Sussex. It has its own blog that updates the details of what’s available when with information about what else is going on at the nursery. So thanks to the wonders of the internet you don’t have to go looking for it – you can find it here.

Why we started the Intelligent Garden

I first started gardening as a research student working on how plants grow. Then we bought a small holding in Shropshire for a while before we discovered computers and marketing. 20 years later we started selling plants on-line.

Expansion meant we needed premises - so we acquired a nursery with 2 acres of glasshouse and started growing organic vegetables again. By September 2008 we had our soil association certification and had started selling biological controls online.

Talking to people on farmer's markets I sense a real hunger for people to garden and produce their own food. And a real interest in local and pesticide free produce.

So we created the Intelligent Garden ito help you get the most from your garden by offering the knowledge, products and advice you need to work effectively with nature to release the intelligence in your garden.

Company Registration 5003969
Vat Registration: 826 8892 74
Reg Office The Glasshouses, Fletching Common, BN84JJ

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Good soil condition

What the soil provides for the plants

Nutrients, water and air extracted via a vigorous and health root system. (and not much competition) Pores in fact make up about 60% of the soil structure. The ratio between large and small pores is important because it controls the balance of air and accessible water to the roots.  If there is not enough air in the soil , root can’t follow the pores. This is a problem with compacted, silty soils especially for fat rooted plants like peas and beans. Thin rooted brassicas don’t suffer so much.  This is why soil compaction by over cultivation or walking on it is to be avoided.  Grass generally improves soil structure – which is why permaculture has its benefits.  Chalky soils hold their structure better than acidic soils

Soils are made up of Sand, silt and clay – as follows

Soil Type

Sand %

Silt %

Clay %

Sandy Loam








Silt Loam




Silt Clay Loam








Soil also contains 1-5% animal matter  which supports soil bacteria and fung I – vegetables will deplete this over 2-4 years.

Signs of lack of organic material are

  • Seedbeds are difficult to prepare
  • Soil doesn’t drain so quickly
  • Crops wilt in dry weather
  • Yields are poor despite nutrients and absence of pests

Good drainage is key to successful growing.  Waterlogged soils kill plants by lack of oxygen. Hard pans must be pierced.  The most common problem is an impervious clay subsoil. Remedies are

  • Add more compost
  • Drain by a ditch
  • Build a raised bed to improve drainage – 4-5 feet wide.

Wet soils are cold in spring and take a long time to get going – wait till it warms up and then transplant seedlings from modules

Raising the level of organic matter requires 5.4 kg per sq meter annually.

Adding organic manure through the top soil delivers these benefits

  • Breaks up clay
  • Improves water retention in sandy soils
  • Use it intensively on things that are gross feeders like leeks and runner beans
  • Variability of supplies indicates use of a soil tester

Liming promotes crop growth and encourages earthworm and micro-organism activity.

If you don’t dig you may find that sands and silt with low organic content may slump and lose structure so causing lack of root growth which can be a problem for short season veg crops.

Soil management is about producing and maintaining a structure to a good depth.  Using beds increases the depth and helps avoid compaction.

Even if  you don’t dig – it may be worthwhile double digging once as this breaks up subsoil compaction – try and put a lot of organic matter in at this time.

Try and plan the garden so its easy to be timely and that plants are spaces so its easy to hoe them. In winter its ok to have weeds on the surface as long as they don’t seed.

Traditional 3 course rotation

Year 1 Year 2 Year 3
Add Organic Manure Lime and Fertiliser
Peas Beans, Onions Leeks

Celery Lettuce

Other Crops


Brassica type Roots


Solanum  Family

5.4kg / sq meter of farm yard manure does not give forking in roots  so you can add it every year. This equals 54 tonnes per hectare.  Or 1.5 tonnes per year for a 10 rod allotment.  (This will represent around two cubic metres)

Keeping the nutrients up means that the land can move on immediately to its next crop.

Key action points

  1. Make sure your drainage is right
  2. Check acidity and lime
  3. Eliminate compaction – double dig once – then go to no-dig
  4. Apply large amounts of organic materials regularly
  5. Compost crop remains unless serious diseases like blight are present
  6. Leave the soil alone when its very wet
  7. Do the minimum of cultivation
  8. Only hoe if weeds are present an be shallow
  9. Rotate the crops