Rootgrow Plant Stimulant

  • Free Delivery
Free Returns
5 Years Guarantee For signed up members
Type Rootgrow, Organic, Hedge Planting Kit, Tree Planting Kit

Mycorrhizal Friendly Fungi

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  Buy 3 or more packs and save

SIZES 1-2 3+
150g Available to order£6.00Available to order£5.88
360g+Gel Available to order£11.50Available to order£11.28
1Kg+Gel Available to order£29.98Available to order£29.88
2.5 Litre Tub + Gel Available to order£58.00Available to order£57.60
5 Litre Tub + Gel Available to order£114.00Available to order£112.80
  Prices include VAT(where applicable)

Please select the size and quantity of packs you would like


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What is Rootgrow?

Rootgrow is made from naturally occurring, symbiotic fungi that co-exist beneficially with the roots of almost all plants, protecting and nourishing them. In order to give your plants the best possible start, it is applied as a powder or gel directly to the roots of bareroot trees and hedging in particular, and is beneficial for pretty much all plants. 

The formula uses an inert clay substrate and a number of bio-available minerals to help your plants settle in. The main ingredients are several species of mycorrhizal fungi; there are different blends of fungi for ericaceous (acidic) soils, and one designed for bulbs.

How does Rootgrow work?

Mycorrhizal fungi dramatically increase the availability of soil nutrients that roots can absorb, and form a protective jacket over the little feeding roots against disease and dryness. In return, the growing roots provide sugars and a way for the fungi to penetrate soil, while the tree above provides summer shade and mulch every Autumn, creating the underground conditions that fungi love. It's a full on symbiotic relationship that greatly improves the growth and survival of your plants, whilst improving the quality of your soil. It makes the biggest difference in poor soils, where water retention is low.

Once established, the fungi will continue to grow in harmony with your trees, bushes and plants, providing a lifetime's supply of natural nutrition.

It really helps to reduce the 'transplant shock' of moving plants from relatively sterile pots to natural earth. 

The shelf life is one year in a cool dry place, and that is surely conservative, but we recommend buying the correct amount and using it promptly if possible for the best results. 

Which Rootgrow size do I need?

Rootgrow comes in 150 gram, 360 gram or 1 Litre resealable pouches, and 2.5 or 5 litre plastic tubs. Except for the 150g pouch, all sizes of Rootgrow come with a gel additive specially for use when planting bareroot hedging.

  • Use Rootgrow in powder form for potted plants, bareroot fruit trees or ornamental standards.
  • Rootgrow gel works better if you are planting bareroot hedging, roses or soft fruit.

When you have placed all of your items in your basket, we will automatically calculate how much Rootgrow you will need, and you will have the opportunity to add this to your order before checkout.

Please note that these figures are approximate and can vary considerably depending on root formation and plant type.

Pack Size->

Plant Size

150g Pouch 360g Gel Pack 1Kg Gel Pack 2.5 Litre Tub 5 Litre Tub
30/60cm plants 40-50 95-120 260-330 650-825 1300-1600
60/80cm plants 30-45 70-100 195-275 480-685 960-1350
90/120cm plants 25-35 60-80 165-225 410-560 820-1120
120/150cm plants 25-35 60-80 165-225 410-560 820-1120
150/180cm plants 25-35 60-80 165-225 410-560 820-1120
Roses - bareroot 15-20 35-45 95-125 230-310 460-620
Fruit Trees 2-3 5-7 14-19 35-45 70-90
Ornamental Standard Trees 2-3 5-7 14-19 35-45 70-90
2 litre pots 6-8 14-19 40-52 100-130 200-260
3 litre pots 4-6 9-14 25-40 60-100 120-200
5 litre pots 3-4 7-9 18-25 45-60 90-120
7.5 litre pots 3 6-7 16-18 40-45 80-90
10/15 Litre pots 2 4-5 11-14 25-35 50-70

Where does Rootgrow come from?

It is developed and produced in the UK, by Plantwork - a leading horticultural research firm that specialises in sustainable, natural plant growth solutions. This is the first and currently the only plant or soil treatment to be endorsed by The Royal Horticultural Society.

This is the first and currently the only plant or soil treatment to be licensed by The Royal Horticultural Society.

Did You Know?

The importance of mycorrhiza was discovered by the German botanist Albert Bernhard Frank (1839-1900) in the 1880's while he was attempting to develop truffle cultivation techniques for the King of Prussia, Wilhelm I; he had conveniently already coined the word 'symbiosis' from his work on lichens some years prior. However, it took until about the 1990's for the mainstream growing industry to catch up and give them serious attention, and anyone whose gardening education began before the mid-90's would have been unlikely to have ever heard of them prior. 

Fungi have been described as the "teeth" of the forest floor: they do most of the work involved in breaking down dead things and making their nutrients available. 

  • Small Box

    Small box

    (Orders containing only seedlings or rooted cuttings)


    including VAT per order


    For ORDERS
    Over £60 inc VAT

  • Standard box

    (Bareroots up to
    1.2m & plants in p9 pots)


    including VAT per order


    For ORDERS
    Over £60 inc VAT

  • Large box

    (Pots up to
    and incl. 7.5L)


    including VAT per order


    For ORDERS
    Over £100 inc VAT

  • Trees & Hedging

    (Bareroot plants and trees
    over 1.2 metres in height)


    including VAT per order


    For ORDERS
    Over £120 inc VAT

  • Pallets

    (Root balls, large pots,
    trees etc)


    including VAT per order


    For ORDERS
    Over £240 inc VAT

  • *Delivery to mainland Britain & the Isle of Wight ONLY. Surcharges to the Isle of Wight and some areas of Scotland apply.

Bareroot planting is best done between November and April
Bareroot and potted - what's the difference?

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Thank you, The Ashridge Nurseries Team.

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