Topiary Feed & Root Starter
Parcel delivery · cost shown at checkout
Unopened, you can return it within 14 days of delivery.
Delivery
Cost shown at checkout.
14 days — unopened returns
Feeding and roots
Quick specifications
In detail
Using it
Specifications
Further reading
What feed and Rootgroweach do for topiary.
Six things to know before the first pack is opened.
N° 01
Rootgrow is not a feed
Rootgrow is natural mycorrhizal fungi. They attach to the roots and spread out through the soil, drawing in water and nutrients the roots couldn't reach alone. Rootgrow isn't a feed, so it goes on at planting, when feed must not.
N° 02
Once, at planting
One application, directly onto the roots or root ball as the plant goes in, then water in well. Bare root, root ball and pot-grown plants all take it: trees, hedging, shrubs, climbers, grasses and ornamentals.
N° 03
NPK, in three letters
Nitrogen drives leaf growth, phosphorus supports roots and potassium helps overall health and flowering. NPK Fertiliser suits hedging, shrubs, trees and shaped evergreens.
N° 04
A release type for steady growth
Semi rapid or controlled release gives even, dense growth through the season, and controlled release feeds for up to six months. Rapid release is a quick boost, never a routine.
N° 05
One feed, in spring
Topiary takes one spring application of slow-release feed, in March or April. For pots only, a mid-summer top-up if the foliage pales or growth slows. Nothing after August.
N° 06
New plants wait
A new plant's first feed is 6–8 weeks after planting, and an autumn planting waits for spring. A drought or a hard cut is no reason for extra feed: the one spring feed stays the rule.
Choose the release type,then time it.
Three steps from this page to the roots.
01
Choose the size or the release type
NPK Fertiliser comes in four release types: semi rapid, rapid, controlled and all release. Rootgrow comes in 60g, 150g and 360g packs and Professional 2.5L, 5L and 10L tubs; 150g covers roughly 15–25 bare root plants or up to 15 two-litre pots, and 360g roughly 35–150 bare root plants, depending on size.
Or take both in a kit: the Twin Topiary Feeding Pack (two packs of NPK Fertiliser, semi rapid release, with Rootgrow 150g) or the Topiary Feed & Root Starter (one pack of NPK Fertiliser, semi rapid release, with Rootgrow 360g). Both kits are priced 5% below their items bought separately.
02
How it travels
Rootgrow goes on at planting, so have it ready for planting day. Everything in this family travels by parcel: Parcel delivery · cost shown at checkout.
03
Use it at the right moment
Rootgrow goes onto the roots on planting day; the first feed follows 6–8 weeks later, or the next spring for an autumn planting. The feeding year after that is set out below.
Questions about any step → answered below.
Three moments,one calendar.
Rootgrow at planting, the spring feed, the pots-only top-up. One pinned frame. Scroll.
Rootgrow, on the roots at planting
Rootgrow goes on once, at planting, directly onto the roots. Sprinkle it onto the roots or the root ball as the plant goes in, so the fungi are in contact with the roots, then water in well and follow the dosage on the pack for the size of plant. Bare root, root ball and pot-grown plants all take it. Rootgrow isn't a feed, so it can go on now, when feed must not: NPK Fertiliser stays out of the planting hole, and the first feed waits until 6–8 weeks after planting. Plant in spring, March to April, or autumn, September to mid-October; an autumn planting waits for spring for its first feed. The planting guide's first-year care takes it from there.
The one spring feed
Once a year, in March or April, as growth gets moving, topiary takes one application of slow-release feed. Semi rapid or controlled release NPK gives even, dense growth, and controlled release feeds for up to six months; rapid release is a quick boost, never a routine. Follow the pack's guidance for your formulation and water it in after applying. For topiary in the ground, that single spring feed is the whole year's feeding: no top-up in summer, nothing after August, and no extra feed after a drought or a hard cut. The complete care guide covers what makes a good spring feed.
Pots only: the mid-summer top-up
A topiary in a pot is the one case for a second feed. If its foliage pales or its growth slows, it can take one mid-summer top-up, and never after August. Pots also need water 2–3 times a week through summer, for life: water until it runs from the drainage holes, 5–8 litres for a standard 50cm pot. And each spring, alongside the feed, replace the top 5–8cm of compost; the top-dressing method is in the container care guide.
From planting dayto the last feed.
Rootgrow on the roots
As the plant goes in, sprinkle Rootgrow directly onto the roots or root ball, so the fungi are in contact with the roots. Follow the dosage on the pack for the size of plant.
Once · at planting
Water in, no feed in the hole
Water in well. Keep NPK Fertiliser out of the planting hole: at planting, Rootgrow is the only thing that goes on.
No feed in the hole
Wait six to eight weeks
A new plant's first feed is 6–8 weeks after planting. Planted in autumn? It waits for spring, and takes its first feed then.
First feed · 6–8 weeks
Feed once, March to April
Each spring, as growth gets moving, give one application of slow-release feed, following the pack's guidance for your formulation.
March–April · once
Water it in
Water the feed in after applying. A pot is watered until it runs from the drainage holes: 5–8 litres for a standard 50cm pot.
Water in after feeding
Pots only: a mid-summer top-up
If a pot's foliage pales or its growth slows, it can take one mid-summer top-up. Topiary in the ground doesn't take it; it waits for next spring's feed.
Pots only · if pale or slow
Nothing after August
No feed after August, and no extra feed after a drought or a hard cut: once the year's spring feed has gone on, the next one waits for spring.
Last feed · August
Drag · Scroll
Missed the spring feed? The seasonal calendar's missed-feed answer covers it, and its March page puts the feed in the year.
The feeding family,at a glance.
Sizes, release types and prices are on each product's page.
N° 01
NPK Fertiliser
Nitrogen, phosphorus and potassium in four release types, for the one spring feed.
See the price →
N° 02
Rootgrow Mycorrhizal Fungi
Natural mycorrhizal fungi for the roots at planting, from 60g to Professional 10L.
See the price →
N° 03
Topiary Feed & Root Starter
One pack of NPK Fertiliser, semi rapid release, with Rootgrow 360g.
See the price →
N° 04
Twin Topiary Feeding Pack
Two packs of NPK Fertiliser, semi rapid release, with Rootgrow 150g.
See the price →
The whole range, from compost to tree stakes: Plant Care & Garden Supplies.
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Rootgrow at planting · one feed in spring · watered in
Feed and Rootgrow.Straight answers.
Is Rootgrow a fertiliser?
No. Rootgrow is natural mycorrhizal fungi, which attach to the roots and spread out through the soil, drawing in water and nutrients the roots couldn't reach alone. Rootgrow isn't a feed, so it can go on at planting, when feed must not: sprinkle it once, directly onto the roots or root ball as you plant, so the fungi are in contact with the roots, water in well and follow the dosage on the pack. The first feed of NPK Fertiliser follows 6–8 weeks later.
Which NPK release type should I choose for topiary?
Controlled release feeds for up to six months; it and semi rapid release, the type in both kits, give even, dense growth. Rapid release is a quick boost, never a routine. NPK Fertiliser also comes as all release, and full feeding guidance for each formulation comes with the product. Whichever you choose, topiary takes one spring application, in March or April.
How soon after planting can new topiary be fed?
Six to eight weeks after planting. A plant that goes in during autumn waits for spring, and nothing is fed after August. After that first feed, topiary takes one spring application a year, in March or April. The planting guide covers the whole first year.
Does NPK Fertiliser go in the planting hole with Rootgrow?
No. At planting, Rootgrow is the only thing that goes on, directly onto the roots: it isn't a feed, so it can. NPK Fertiliser stays out of the planting hole and waits for the first feed, 6–8 weeks after planting, or the next spring for a plant that goes in during autumn. Water the feed in after applying.
Does topiary in a pot need a summer top-up feed?
Only if the foliage pales or growth slows. Then a pot can have one mid-summer top-up, never after August. Topiary in the ground doesn't take this top-up; it waits for next spring's feed. A dry spell or a hard cut is no reason for an extra feed either: water a pot until it runs from the drainage holes, 2–3 times a week through summer, and let the one spring feed do its work.
Which Rootgrow pack size do I need?
The 150g pack is plenty for a few shrubs, covering roughly 15–25 bare root plants or up to 15 two-litre pots. A hedge or larger scheme suits 360g, roughly 35–150 bare root plants, depending on size. Rootgrow also comes as a 60g pack, and the Professional 2.5L, 5L and 10L tubs are for landscapers and bigger projects. It goes on once, at planting, so size it to the plants going in.
What's the difference between the Twin Topiary Feeding Pack and the Topiary Feed & Root Starter?
The Twin Topiary Feeding Pack holds two packs of NPK Fertiliser (semi rapid release) and Rootgrow 150g; the Topiary Feed & Root Starter holds one pack of NPK Fertiliser (semi rapid release) and Rootgrow 360g. Both kits are priced 5% below their items bought separately. Choose by the size of the planting: Rootgrow 150g, with two packs of feed, for a few shrubs; Rootgrow 360g, with one, for a hedge or a larger scheme.
Roots first.Then one feed a year.
Rootgrow at planting, the first feed six to eight weeks later, then one spring feed each March or April, and nothing after August.
Parcel delivery · cost shown at checkout
When to feed and what to skip, in the complete care guide.