Right plant, right place: the one rule that changes everything in a Kent or Sussex garden

The single most important principle in gardening is deceptively simple: put the right plant in the right place. It sounds obvious, but most gardening failures come from ignoring it — and in Kent and Sussex, where soil types can change dramatically within a few miles, it matters more than almost anywhere.

The South Downs and North Downs are chalk — thin, alkaline, free-draining soil that warms up fast in spring but dries out quickly in summer. The Low Weald between them is heavy clay — moisture-retentive, fertile, but prone to waterlogging in winter and baking hard in drought. Coastal gardens face salt winds and sandy soils. Each calls for a completely different approach.

Before you buy a single plant, spend a season observing your garden. Where does the sun fall in the morning? Which areas stay damp after rain, and which dry out within days? A simple soil test kit (available from any garden centre) will tell you your pH — the single most useful piece of information you can have.

Chalk and downland soils (pH 7.5–8+) suit lavender, clematis, rosemary, and many Mediterranean herbs. The heavy Wealden clay (often pH 6.5–7) is brilliant for roses, dahlias, and fruit trees once you've improved its drainage with organic matter. Sandy coastal soils suit sea holly, agapanthus, and ornamental grasses.

The RHS Plant Finder is an invaluable free resource. Search by soil type, aspect, and hardiness zone and it will suggest plants proven to thrive in exactly your situation. For local inspiration, the gardens at Great Dixter in East Sussex and Sissinghurst in Kent are both masterclasses in right plant, right place — and both are open to visitors.

The reward for getting this right is a garden that largely looks after itself. Plants in the right conditions are naturally more vigorous, more resistant to pests and disease, and need far less intervention from you.