SB Plant Invigorator Concentrate

SB Plant Invigorator Concentrate

Item: XSSB

in stock In stock

500 ml
Available stock: 33
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UK mainland delivery from £8.95

Environmentally friendly Growth Stimulant and Pesticide.
We think this is a new wonder product! It was developed by a large Guernsey Tomato grower and is an organic soap based product. It has a physical mode of action and controls a wide range of pest species including Whitefly, Spider Mite and Mealybug. It also helps to control mildew and other fungal problems.
SB also contains Nitrogen and Iron Chelates (perfect for Rhododendrons!) which stick to the foliage in the soap and encourage strong healthy growth. It makes a good plant wash for the leaves, leaving a clean shiny appearance.
You can use it on all edible and ornamental crops, and it is biodegradable and non-toxic with no harvest interval.
On our nursery we have used this for several years as part of our non-chemical armoury in rotation with other products. We believe it gives excellent results against aphids, leaf-hoppers (which spread bud blast) and powdery mildew. Also good to control scale insects and unsightly sooty mould deposits on foliage. It promotes good dark green healthy leaves.
The bottles may look expensive, but 250ml dilutes to 25 litres of spray, (and 500ml dilutes to a massive 50 litres!) which you can safely apply without using nasty chemicals. Try monthly applications in June, July and August to keep your plants free from pests and diseases, or use weekly to stimulate a clean healthy crop,

Customer Reviews

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"At the moment the product seems to be working well however it is too soon to give a full review so far good."

Good to know

We aim to offer an interesting range of sundries to ensure that your chosen plants get off to the best possible start in your garden. Plant them properly with the right products, and they will reward you well for years to come!  Add some of these essentials when you place your order.

Composts -  Excellent quality and value. A far better professional quality compost than anything offered by the main garden compost suppliers. Our compost has proper aeration and drainage, and is not milled to dust like so many other composts

Fertilizer - We tried the lot, and now we have commissioned our own slow-release fertilizer which we use on the nursery with great results, as it has all the right ingredients for ericaceous plants! We also offer a range of ‘curative’ fertilizers to correct deficiencie

Natural tonics and controls - We have sourced some really good professional grade organic products that work, and that we use on our nursery with good results. These help to keep your plants in tip-top condition.

Tools - Everyone needs a new pair of gloves, secateurs and some good tools from time to time. We list some quality products at a good price.


For further advice, For further advice, see here

The Basics

Ideal soil

Acidic soil, good organic content, pH 4.5-6.0. Inkarho range of rhododendrons will tolerate soils up to pH7.5

Sun or Shade

Light dappled shade is best for most varieties.


Refer to hardiness rating. Give young plants protection.

Site Selection

Avoid close to trees, roots, invasive weeds, walls, hot patios, dry banks and waterlogged soils. Do not use weed matting or stone mulch.

Plant spacing

Use the height shown in 10 years as a guide to the distance between each plant. Allow room for plant to fill out. If planting closer for instant impact, be prepared to move plants after a few years.


  • 3 litre pot, dig in 10-20 litres of ericaceous compost.
  • 7.5 litre pot, dig in 20-30 litres of ericaceous compost.
  • 70-80cm specimen, dig in 60 litres of ericaceous compost.
  • 100-120cm specimen, dig in 120 litres of ericaceous compost.

Planting depth

Plant high in the ground, with the top of the rootball visible.


Slow-release ericaceous feed recommended in March and straight after flowering.


Recommended every few years.


The key ingredient! Keep moist all season, especially the critical time at end of June for flower bud initiation. Tap water is better than no water. Heavy dose at least once per week in dry weather.


Ensure good drainage in winter, especially with yellow flowering varieties. Avoid waterlogged sites.


Rhododendrons and Camellias: Not normally required. Tidy wayward shoots after flowering.

Evergreen azaleas and Bloombux can be clipped into a low hedge.

Magnolias and Acers: Formative pruning when young to shape into a tree or bush.


Remove old flower-heads, particularly on young or weak plants.

For further advice see here

Size Guide

Size guide

Delivery & Returns

Our website calculates the delivery charge according to weight and delivery location throughout the UK. To see these charges, please enter your postcode at the checkout, and you will see the charge vary as you add more items to your wheelbarrow.

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