the dr forest blog

Pile of pale grey-tan polyhalite granules on a wooden table beside a potted herb, a hessian soil sack, gloves and a trowel

What is polyhalite, and why does Wimbledon use it?

Polyhalite What is polyhalite, and why does Wimbledon use it? By Joe, Founder of Dr Forest · May 2026 In summer 2023, the Daily Telegraph ran a piece on the...

What is polyhalite, and why does Wimbledon use it?

Polyhalite What is polyhalite, and why does Wimbledon use it? By Joe, Founder of Dr Forest · May 2026 In summer 2023, the Daily Telegraph ran a piece on the...

Tomato plant in a raised bed with markedly yellowing leaves and ripening red and green fruit, an allotment shed behind

Why Are My Tomato Leaves Turning Yellow? | Comp...

Yellow leaves on a tomato plant aren't one problem. They're a symptom of half a dozen different things, and the right fix depends on which one. The position of the...

Why Are My Tomato Leaves Turning Yellow? | Comp...

Yellow leaves on a tomato plant aren't one problem. They're a symptom of half a dozen different things, and the right fix depends on which one. The position of the...

Split-frame comparison: a lush fruiting tomato with dense white roots labelled With Mycorrhizae beside a sparse seedling labelled Without Mycorrhizae

What Are Mycorrhizal Fungi? A Guide for UK Gard...

Mycorrhizal inoculants help most UK garden plants but do nothing for brassicas, beets or rhododendrons. The full list of which benefit and when to apply.

What Are Mycorrhizal Fungi? A Guide for UK Gard...

Mycorrhizal inoculants help most UK garden plants but do nothing for brassicas, beets or rhododendrons. The full list of which benefit and when to apply.

Gloved hand holding a pH test strip and colour chart over potted plants, with trowels and a teal watering can in a greenhouse

How to increase or decrease your soil pH

In organic gardens you'll often hear that pH doesn't matter because the soil buffers it. Only partly true. pH drifts even in well-tended organic systems, slowing growth before you notice....

How to increase or decrease your soil pH

In organic gardens you'll often hear that pH doesn't matter because the soil buffers it. Only partly true. pH drifts even in well-tended organic systems, slowing growth before you notice....

Gloved hand scooping pelleted fertiliser into a terracotta pot of herbs, a hessian Dr Forest sack alongside, sunny greenhouse

What is a fertiliser?

What is a fertiliser, what are the 17 essential plant nutrients, and how do you tell which one your plant is missing? A complete reference guide for UK gardeners.

What is a fertiliser?

What is a fertiliser, what are the 17 essential plant nutrients, and how do you tell which one your plant is missing? A complete reference guide for UK gardeners.

The word ZINC formed in metallic 3D letters among grey mineral rocks and powder

Zinc's Role in Improving Flavour and Aroma by I...

Soil science · Micronutrients Zinc, terpenes and the flavour of what you grow By Joe, Founder of Dr Forest · May 2026 Plants short of zinc will keep growing. They...

Zinc's Role in Improving Flavour and Aroma by I...

Soil science · Micronutrients Zinc, terpenes and the flavour of what you grow By Joe, Founder of Dr Forest · May 2026 Plants short of zinc will keep growing. They...