Species

Aphids: Clone Armies on the Underside of the Leaf

The sap-sucking superfamily that vectors viruses, farms with ants, and collapses overnight when you let the right predators in.

Ripe red currants and a black gooseberry on a pruned woody bush against summer foliage

№ 007

Berry Bushes: Currants, Gooseberries, Honeyberry, Aronia

Cool-temperate workhorses for the cold corner where blueberries refuse. Currants, gooseberries, jostaberry, honeyberry, aronia. Pruning, yields, blister rust.

Ripening highbush blueberries in clusters on a pruned shrub with pine needle mulch at the base

№ 010

Blueberry and Acid Shrubs: Building a pH 4.5 Garden

Vaccinium and friends want soil most plants would die in. How to build that soil, choose the right cultivars, and keep a stand productive for thirty years.

A green cabbage looper caterpillar arching across a chewed brassica leaf in morning light

№ 012

Caterpillars: Reading the Flight Calendar

The five caterpillars that hit a temperate garden hardest, when their parent moths fly, and how to break the cycle without spraying everything dead.

A young oak sapling inside a tall plastic tree tube, set against a fenced reforestation plot with browsing deer in the distance

№ 028

Deer and Rabbits: The Browse Problem

Browse pressure kills more young trees than drought or frost. How to fence, tube, and plant around the animals that eat your reforestation.

Clusters of dark purple elderberries hanging from a Sambucus nigra branch with serrated green leaves

№ 035

Elderberry: The Hedge Shrub That Pays Rent

Sambucus nigra and S. canadensis. A keystone berry shrub for birds, cordial, and tincture. Roots from a winter stick. Just don't eat it raw.

A small shiny black flea beetle on a perforated arugula leaf showing classic shothole damage

№ 041

Flea Beetles: The Shothole Specialists

Tiny jumping beetles that lace young brassica leaves with pinholes. How to keep them off your seedlings without nuking the bed.

A diverse polyculture vegetable bed with ladybirds on chewed brassica leaves, framed by flowering herbs

№ 046

Garden Pests: A Worldview, Not a War

A pest is a forager whose appetite collides with yours. Most outbreaks are biodiversity gaps. Here is how to think before you spray.

Dense hawthorn hedge in full white blossom on a chalk bank with grazing land behind

№ 049

Hawthorn: The Hedge that Outlives the Hedger

Crataegus monogyna and 280 cousins. The thorned backbone of the British mixed hedge, a 500-year tree, and a heart medicine in one shrub.

A multi-stemmed hazel stool with straight new shoots rising from a cut base in winter woodland

№ 050

Hazel: The Coppice Workhorse

Corylus avellana. A nut tree that doubles as a stake factory. Cut it every seven years and it pays in poles, pollen, and filberts.

A line of leafcutter ants carrying green leaf fragments along a forest trail

№ 061

Leafcutter Ants: The Underground Farmers

The Atta and Acromyrmex species that defoliate a young tree overnight, and how to live alongside them without losing the orchard.

White cottony mealybugs and brown scale insects clustered along the stem of a citrus branch

№ 065

Mealybugs and Scale: The Sap Drinkers

Cottony cushion scale, soft scale, and mealybugs. How to break the honeydew loop with cotton swabs, oil, beetles, and an ant fence.

A hillside of flowering lavender and rosemary with grey-leaved cistus in the foreground under hard sun

№ 066

Mediterranean Shrubs: The Dry-Garden Backbone

Rosemary, lavender, sage, cistus, oleander. Aromatic woody plants built for sun, stone, and almost no water once they take.

Bright orange sea buckthorn berries clustered on silver-leaved branches against an autumn sky

№ 080

Nitrogen-Fixing Shrubs: The Frankia Partnership

Sea buckthorn, goumi, Siberian pea, and their kin. Shrubs that host Frankia bacteria and pull 70 to 180 kg of nitrogen per hectare out of thin air.

Ripe raspberries and blackberries on thorny canes against a hedgerow

№ 102

Raspberry and Bramble: The Rubus Genus at Work

Raspberries, blackberries, and their wild cousins. Cane biology, pruning by type, and bramble as a restoration species for raw ground.

A mixed native hedgerow of hawthorn, hazel, and elderberry in flower along a field edge

№ 113

Shrubs and Bushes: The Forgotten Middle Layer

Multi-stemmed, waist-to-chest-high, and chronically under-planted. Shrubs do the work trees and herbs cannot, and most growers skip them entirely.

A grey field slug crossing a hosta leaf at night with rain-wet soil in the background

№ 117

Slugs and Snails: The Pest Most Punished, Least Controlled

Why the beer traps and copper rings barely work, and what actually moves the needle: ducks, ground beetles, and habitat you stop offering.

A young fruit tree wrapped in hardware cloth at the trunk base with gravel collar around the root crown

№ 136

Voles and Gophers: The Winter Bark Strippers

Two different rodents, two different problems. How to tell Microtus runways from Geomyidae mounds, and how to keep young trees alive through winter.

Underside of a tomato leaf showing tiny white winged insects clustered along the veins next to fine webbing from spider mites

№ 141

Whiteflies and Spider Mites: The Greenhouse Twins

One pest loves humidity, the other loves drought. Together they cover the whole greenhouse year. How to read them, knock them down, and ship in their predators.

A mixed winter hedgerow with red dogwood stems, dark blackthorn spines, and clusters of holly berries

№ 144

Wildlife Shrubs: Feeding the Hedge Through Winter

Guelder rose, dogwood, holly, blackthorn, wayfaring tree. The five shrubs that turn a fence line into a working hedgerow for birds, bees, and nesting cover.

A small brown bat hanging from the inside of a wooden bat box at dusk

№ 006

Bats: Night Shift Pollinators and Pest Control

Why bats are the most underrated garden allies on the planet, eating thousands of insects nightly, pollinating night-flowering crops, and dispersing seeds across kilometres.

A wavy hedgerow boundary between woodland and meadow with wildflowers in the transition zone

№ 034

Edge Effects: Where Two Habitats Meet

Why the boundary between two habitats hosts more species than either alone, and how to design landscapes for more edge, not less.

A small herd of European bison grazing in a fragmented patch of forest

№ 067

Minimum Viable Populations: How Small Is Too Small

Why isolated populations below a few hundred individuals slide toward extinction even when habitat looks fine, and how corridors and connectivity prevent it.

Mesquite tree in flower with seed pods hanging beside an old honey locust trunk

№ 079

Nitrogen-Fixing Food Trees: Carob, Honey Locust, Mesquite

Trees that feed the soil and feed you. Carob, honey locust, mesquite, and a handful of others deliver food, fodder, and free nitrogen.

Open stone pine cone with edible kernels arranged on a wooden board

№ 083

Nut Pines: Stone Pine, Korean Pine, Pinyon

Long-lived cold-hardy pines that drop high-calorie nuts, build soil, and produce excellent timber. Plant for your grandchildren and feed yourself in the meantime.

A ladybird larva feeding on aphids on the underside of a broad bean leaf

№ 097

Predator-Prey Balance: Build Habitat, Skip the Sprays

How to attract ladybirds, lacewings, ground beetles, owls, and snakes so they do the pest control work that pesticides do badly.

A vertical cross-section through a mixed oak woodland showing ground flora, shrub layer, understory, and canopy

№ 125

Structural Diversity: Layers Equal Niches Equal Species

Ground cover, shrubs, understory, canopy, emergents. Each vertical layer doubles the species count. Design for layers.

Alder trees growing along a stream bank with catkins hanging from bare branches

№ 002

Alder: The Nitrogen-Fixing Wet-Site Pioneer

How alder partners with Frankia bacteria to fix nitrogen, hold stream banks, and turn waterlogged ground into fertile soil for the trees that come next.

Sweet chestnut tree with spiny seed husks and broad canopy

№ 014

Chestnut: The Tree That Fed Civilisations

How chestnuts fed mountain Europe for millennia, why the American chestnut nearly vanished, and how to fit chestnuts into a working food forest.

Fungal brackets and moss growing on a decomposing fallen log in a woodland

№ 026

Decomposers: The Hidden Recyclers

Fungi, bacteria, beetles, and worms unlock nutrients from dead matter. Without them, soils never form and forests collapse within years.

Earthworms in rich dark soil alongside decomposing leaf litter

№ 033

Earthworms: Nature's Tillers

Why Darwin called earthworms the most important creature on earth, and how to count, feed, and protect the populations that build your soil.

Mature eucalyptus forest with peeling bark and dappled understorey light

№ 037

Eucalyptus: Controversial Giant, Essential Keystone

Why eucalyptus is not one tree but over 700 species, irreplaceable in Australia and disruptive when planted as monocultures elsewhere.

A large fig tree with buttress roots and dense canopy in a tropical forest

№ 038

Fig Species: Tropical Keystones That Feed Everything

Why 750-plus species of Ficus are the most important tree genus in the tropics, fruiting year-round and feeding more wildlife than almost any other plant.

An apple tree surrounded by diverse companion plantings including clover, comfrey, and flowering herbs

№ 045

Fruit Tree Guilds: Self-Fertilising Systems

Design plantings around a fruit tree so nitrogen fixers, dynamic accumulators, ground covers, and pest confusers feed the system and reduce inputs every year.

A hoverfly feeding on a flat-topped umbellifer flower head

№ 053

Hoverflies: Pollinator and Pest Controller in One

How hoverflies deliver both pollination and aphid control in one insect family, and why flat-topped umbellifer flowers pull them in.

Lichens growing on tree bark in a clean-air woodland

№ 056

Indicator Species: Reading Ecosystem Health at a Glance

How lichens, amphibians, dragonflies, and earthworms reveal the real condition of air, water, and soil on your site.

A solitary bee entering a nest hole in bare sandy ground

№ 073

Native Bees: 20,000 Species Beyond the Honeybee

The world's 20,000 wild bee species are mostly solitary, mostly overlooked, and outperform honeybees on most crops they touch.

A diverse native hedgerow with wildflowers and visiting insects

№ 076

Native Over Exotic: Why Local Species Matter

How native plants anchor local food webs, why genetic provenance shapes restoration outcomes, and where the native-exotic line gets blurry.

Root nodules on a legume root system showing pink nitrogen-fixing tissue

№ 078

Nitrogen-Fixing Bacteria: Free Fertiliser in Every Root

How Rhizobium, Frankia, and free-living bacteria pull atmospheric nitrogen into the living world and feed every productive ecosystem.

Paulownia tree with large heart-shaped leaves and purple flower clusters

№ 089

Paulownia: The Fastest Growing Hardwood on Earth

Paulownia grows faster than any hardwood on earth. That power makes it valuable on degraded land and dangerous in the wrong place.

A thrush perched on a berry-laden branch with forest in the background

№ 109

Birds as Seed Dispersers: Recruitment Services for Free

Fruit-eating birds carry seeds kilometres from parent trees, drive forest regeneration, and stitch fragments together when you plant the right fruiting species.

Silver birch trees with white peeling bark in a woodland clearing

№ 114

Silver Birch: Light Canopy, Deep Roots

How silver birch colonises bare ground, connects with over a hundred fungal species, and nurses slower trees toward maturity.

Mature walnut tree with compound leaves and developing green nut husks

№ 137

Walnut: High-Value Timber and Food

Walnut pairs premium timber with calorie-dense nuts. Design around juglone allelopathy and you get one of the most profitable trees in temperate agroforestry.

Willow cuttings sprouting new growth along a riverbank

№ 145

Willow: The Pioneer That Grows from a Stick

Willows root from bare cuttings, stabilise riverbanks, coppice endlessly, and serve as living infrastructure across temperate landscapes.

Microscopic view of soil organisms among root hairs and fungal hyphae

№ 119

The Soil Food Web: Life Beneath Your Feet

The invisible ecosystem in healthy soil: bacteria, fungi, protozoa, nematodes, and arthropods that cycle nutrients and build structure.

Oct 2025Read →

A massive baobab tree with a wide trunk standing in dry savanna

№ 005

Baobab: The Tree of Life

The ancient baobab stores thousands of litres of water, feeds people and pollinators, and anchors African savannas for two thousand years.

Oct 2025Read →

Mangrove roots extending into shallow tropical water

№ 063

Mangroves: Coastal Guardians

Salt-tolerant trees that build coastline, store carbon at five times the rate of upland forest, and feed three quarters of tropical fisheries.

Sep 2025Read →

A mature oak tree in a woodland setting with diverse understory

№ 074

Native Oaks: Backbone of Temperate Forests

Why native oaks support more biodiversity than almost any other tree genus, and how to grow them for restoration and food production.

Sep 2025Read →

Moringa oleifera tree with feathery leaves and seed pods

№ 070