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Allotment gifts for Christmas
Feed sets and gift cards growers actually use. Shop allotment gifts
The Dr Forest blog · Est. Stockport · England · 2020
Evidence-led guides to organic fertiliser, feeding and soil science for UK growers. Deficiencies, ingredients, biostimulants and crop-by-crop feeding, with every claim checked against the original paper.
Search the guides
Featured guide · Crop guides
For most home growers, the best fertiliser for tomatoes is a tomato feed with more potash (the K on the label) than nitrogen (N), started when the first fruits begin to swell. The RHS suggests feeding tomatoes in...
Read the guide
Plate 01
Tomatoes
NPK stages, yellow leaves, blossom end rot and when a tomato feed is the wrong tool.
Lawns
High-nitrogen timing, autumn recovery and when a wetting agent actually helps.
Soil improvers
Living soil, rock dust and what actually changes a tired bed over a season.
Humic & fulvic
Humic granules vs fulvic liquid, rates, and when each one earns its keep.
Wetting
Dry patch, hydrophobic compost and why washing-up liquid is a bad swap.
Microbes
Root fungi at planting, shelf life, lawns, and new-build beds that need the network rebuilt.
Guide
In short. Take soil from five or six spots, 10 to 15 cm down, mix it, and test it with a chemical colour-chart kit and distilled...
mineral soil improver · Guide
A soil conditioner and a soil improver are the same thing. The organic half and the mineral half, which suits your soil, and why neither is...
lawns · Guide
Contents Do lawns already have them? What studies show on new lawns What studies show on established lawns Do shop-bought products work? Are granules effective? If...
mycorrhizal · Guide
Contents How long it lasts in the bag Temperature and moisture Spores or root pieces? Why a missing date is a red flag How long Dr...
all purpose · Guide
High-potash tomato feed is a job, not a tonic. Yes for fruiting tomatoes and chillies; no for lawns, leafy salads, ericaceous plants and mixed gardens.
4-4-4 fertiliser · Guide
A 4-4-4 can look weak on the shelf, because all three numbers are low. What 4-4-4 actually means, why a low number is not a weak...
4-4-4 fertiliser · Guide
Two bags on the same shelf can both say slow release and mean quite different things by it. One meters a salt out through a shell....
baby shampoo wetting agent · Guide
Every forum thread has the same answer: baby shampoo. What is actually in the kitchen options, what the evidence supports, and the one homemade route with...
compost wetting agent · Guide
Most of the water you pour on a dried-out pot never touches the rootball. What the published measurements show, and when a wetting agent is and...
The garden journal
One letter a month on what to feed, when to feed it, and why it works. Written by Joe, for growers who want to understand their soil.
