Growing Herbs: The Layout and Setup Decisions That Matter

Herb gardens fail most often not from poor growing conditions but from poor planning — putting invasive mint in a shared bed where it takes over, mixing annuals and perennials without accounting for what happens when you need to pull the annuals, and not giving tall growers enough space to work with. Getting the setup right before planting makes the difference between a herb garden you harvest from all season and one you're fighting.

Plan on Paper Before You Dig

The single most useful thing you can do before buying any plants is sketch the bed — even a rough plan on a scrap of paper — and classify what you're planting by type. Annuals (basil, coriander, dill) need to be separated from perennials (rosemary, thyme, sage, oregano, chives) for a simple reason: when you need to pull the annuals at the end of their season or turn the soil to replant, you don't want to disturb established perennial root systems.

A practical layout puts perennials at the edges where they won't be disrupted when you work the central area. Tall plants — fennel, lovage, angelica — go at the back or centre if the bed is viewed from all sides. Low-growing plants like creeping thyme or chives at the front.

Give each plant its eventual footprint at planting time. Rosemary becomes a substantial shrub over a few years. Planting it 60cm from a path because you can reach the centre of the bed sounds reasonable in year one; it becomes genuinely inconvenient by year three.

Dealing With Invasive Herbs

Mint is the classic example of an herb that should almost never go in a shared bed. It spreads by underground runners aggressively and will overwhelm everything planted beside it within a season or two.

The practical solution is containment. A herb planter pot sunk into the bed with the rim slightly above soil level physically blocks runner spread. Alternatively, grow mint entirely in containers and keep it separate from the main herb bed. This isn't overcautious — anyone who has tried to remove established mint from a shared bed knows why.

Other potentially invasive herbs: lemon balm, tarragon, and bronze fennel. All worth containerising or giving isolated sections.

Container Herb Growing

A tiered herb pot — a large container with multiple planting pockets — is an efficient use of a small space. Fill the lower section first, plant the herbs that need the most water at the bottom (where drainage accumulates slightly), and the most drought-tolerant at the top.

Drainage matters more in herb containers than in most other container gardening. Most culinary herbs (particularly Mediterranean ones — rosemary, thyme, oregano) come from rocky, free-draining soils and will rot in waterlogged mix. Use a potting mix with added grit or perlite, ensure the container has adequate drainage holes, and do not water until the top 2cm of mix is dry.

Growing From Seed vs Buying Plants

For herbs you'll use in quantity — basil, coriander, parsley — growing from seed is significantly cheaper and gives you more plants for succession planting. For slower-establishing herbs — rosemary, thyme, tarragon — buying a small established plant and growing it on is more practical than waiting for seeds to develop into useful plants.

Follow seed packet directions for soil temperature and light requirements. Most herb seeds are small and should be covered only lightly — a thin layer of fine compost or vermiculite rather than buried. Consistent moisture until germination, then back off to normal watering.

What I'd Skip

I'd skip buying pre-mixed "herb collections" in a single small pot from supermarkets. Those are multiple plants grown densely for decorative shelf appeal, not for long-term productivity. Pot them individually into proper-sized containers the moment you get them home, or treat them as short-term kitchen herbs to use immediately.

**Bottom line:** Sketch the layout first, separate annuals from perennials, contain invasive types, use a free-draining mix, and match container size to the herb's eventual scale. An herb garden that's planned well is nearly maintenance-free through its first few seasons.