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RootGrowKey Benefits of Planting with RootGrow

RootGrow enhances a plant's root system so a newly planted plant:

  • Finds more food, finds more water.
  • Needs less fertilizers.
  • Establishes quicker and reduces failure rates.
  • Has increased tolerance to drought and adverse soil conditions.

These "friendly" mycorrhizal fungi are completely natural and organic and native to UK soils.

How to use RootGrow

The mycorrhizal fungi granules need to come into direct contact with the plant's roots.

There are two methods of application, as a dry granule for container grown plants and as a root dip for bare root plants.

Pot/Container Grown Plants

A good rule of thumb is to look at the bottom of the pot to be treated as you will need enough rootgrow granules to lightly cover this area. To do this, dig a hole to the correct depth then lightly sprinkle the bottom of the planting hole with rootgrow and plant the plant directly onto the granules.

For very small plants from the cell grown range (marked Cg in the catalogue) again the principle of getting the granules into contact with the roots is important. Water the plants and then roll the root plug onto a saucer of granules and whatever sticks should be enough.

For seed trays mix rootgrow 1:19 with the compost. As a guide this table shows how many plants the different packs of RootGrow will treat.

Plant Pot Size Approx. number of plants treated per pack
60g 150g 360g 1Kg 5L
Cell Grown Plants (Cg in catalogue) 20-24 50-60 120-145 330-400 1330-1600
9cm - Pot Grown Plants from our mail order range (Pg in catalogue) 16 40 96 265 1060
2 Litre Pot size
(e.g. 17cm diameter at top,13cm tall)
3 8 19 50 210
5 Litre Pot size
(e.g. 22.5cm diameter at top,18cm tall)
1 4 9 26 106
10-15 Litre Pot size
- 1 2 6 26

Bare-Rooted Plants

To treat bare root plants (Shown as Br, Tr or Sd in the catalogue) the most economical and effective way is to make up RootGrow as a dipping gel. You can use the non-gel mix on bare-rooted plants by sprinkling it on the roots.

For plants with very large roots it may only be necessary to dip the lower half of the roots. For plants with very small roots it is advisable to dip the whole root.

The amount of RootGrow you need depends on the root size. As a guide this table shows how many plants the different packs of RootGrow will treat.

Bare Root Plant Size Approx. number of plants treated per pack
60g 150g 360g 1Kg 5L
30cm (1 ft) 21-25 52-63 126-151 350-420 1400-1680
30 - 60cm (1-2ft) 16-20 40-51 97-122 270-340 1080-1360
60 - 90cm (2-3ft) 12-16 31-42 75-100 210-280 840-1120
90 - 120cm (3-4ft) 9-12 22-30 54-72 150-200 600-800
120 - 150cm (4-5ft) 7-10 17-25 41-61 115-170 460-680
150 - 180cm (5-6ft) 6-9 15-22 36-54 100-150 400-600

RootGrow. Go to Top of Page

RHS RootgrowRootGrow can be used on 90% of garden plants (the main exceptions being Brassicas and Ericaceous plants).

The Gel Mix is best used on larger quantities of bare root plants as the roots can be dipped. Packs containing gel can be used in granular form if required.

Size Gel Mix Price
60g No £2.25
150g No £4.99
360g Yes £10.99
1Kg Yes £24.99
2.5L Yes £45.00
5L Yes £89.99
10L Yes £165.00

Empathy After Plant. Go to Top of Page

Empathy After PlantEmpathy After Plant, produced by the manufacturers of Rootgrow, is the natural complementary feed to use twice during the growing season. After Plant works in three ways:

1. A source of organic matter and soil conditioners to improve the soil.
2. A source of nutrients from the most sustainable and organic sources possible.
3. A kick start for soil biology with bacteria, fungi and stimulants to make the plants grow.

Find out more about this range of products here.

How Rootgrow Works

The white roots are produced by Mycorrhizal FungiMycorrhizal Fungi are widespread throughout nature and are a fundamental reason for normal plant growth and development. In fact 90% of all plants rely on a Mycorrhizal Fungi root system.

Such fungi colonise plant or tree roots, extending the root system into the surrounding soil, via an extensive network of fungal filaments (up to 20 metres in a teaspoon of soil). These thread-like filaments extract nutrients and water from a large soil volume and exchange them for carbon from the plant. This secondary root system, when established, links the root systems of adjacent plants or trees and helps share, more efficiently, nutrient resources throughout the plant community.

All the white roots on the Larch seedlings in picture are 'Friendly Fungi' roots, the thicker red/brown roots are the Larch's roots. This fungal network increases the volume of soil explored by the plant by up to 700 times.

Gardening including hoeing, tilling and regular chemical fertilizer use can inadvertently disturb and reduce the friendly fungal root network. Equally, the roots of some plants may seek a fungal partner that is not abundantly found in our gardens. Without changing your garden methods you can introduce mycorrhizas suitable for UK gardens through a simple application of RootGrow to the planting hole during planting out.

It is now recognised that the lack of the mycorrhizal relationship is a major cause of poor plant and tree establishment. While a plant will gradually develop its own mycorrhizal root system, planting them with RootGrow will speed this process up. It can take up to 3 years for it to develop naturally, while using RootGrow can get the mycorrhizal root system established within one month.

RootGrow Gel Mix is ideal for treating bare rooted plants and large quantities of pot grown plants. If mixed up in a bucket plants can be dipped in this before planting.
Empathy Root Grow

RootGrow is made by Empathy. Empathy is about making a choice to garden with minimal use of chemicals whilst maximising plant growth and health. Empathy products are biological, they will benefit your plants not just over a few months but through their lifetime and are designed to treat the soil as well as the plant. Empathy supports the RHS mission of 'Sharing the best in Gardening'


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