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.
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Featured guide · Crop guides
Three choices decide your tomato crop before you pick up a bag: organic or mineral, dry or liquid, tomato-specific or all-purpose. A science-led, honest guide to each, from the founder of Dr Forest.
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Plate 01
high nitrogen fertiliser for grass · Guide
A high nitrogen lawn feed drives the dense, deep-green growth a lawn is judged on. Here is when grass actually needs one, the UK feeding calendar,...
bokashi bran · Guide
Bokashi bran earns its keep beyond the kitchen bin. Worked into a soil mix or used as a top dressing, it adds organic matter and soil...
certified organic nitrogen · Guide
A high nitrogen fertiliser is the right tool for one job: leafy, green growth. Here is what it does, when leafy crops and lawns actually need...
animal-free plant food · Guide
Most organic plant foods are built from fish, blood and bone. A vegan feed leaves the animal content out and supplies the same nutrients from plant...
application rate · Guide
How to apply fulvic acid as a foliar spray, soil drench and seed soak, with the peer-reviewed dose data behind every rate. Plus the hormesis rule...
foliar feeding · Guide
Pour water onto dry compost and a lot of it runs straight out the bottom, leaving the middle dry as a bone. A wetting agent lowers...
Ascophyllum nodosum · Guide
Seaweed fertiliser is a biostimulant, not a feed — its value is in the bioactive fraction, not its tiny NPK. Here's what it does, the three...
chloride-free potash · Guide
Two of the cleanest potash options a UK gardener can buy. They look similar on the label, behave very differently in the soil, and answer different...
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.
