For herb rotation in a kitchen garden, keep established perennial herbs in permanent positions and rotate short-lived crops through separate growing patches. Match each planting to your climate, start replacements before the old crop finishes, and record plant families rather than just herb names. That gives a small garden a workable calendar without digging up productive rosemary every season.
How should you divide a 30-square-metre garden?
Treat 30 square metres as the whole footprint, including access. One suggested layout is three seasonal beds of four square metres each, six square metres of permanent herbs, and twelve square metres for paths, working space and pots. These are planning allowances, not planting-density requirements.
Label the seasonal beds A, B and C. Keep them narrow enough to reach the middle from a path. Put frequently picked herbs near the kitchen-side entrance, where harvesting does not mean stepping through a bed.
Keep rosemary, thyme and oregano in the permanent section, grouped around their preference for good drainage. Give mint its own pot so its spreading stems do not take over the seasonal beds. On a balcony, use three separate containers as the rotating patches and smaller pots for permanent herbs.
What does companion planting actually help with?
Start with compatible water needs, mature size and access to light. A thirsty, crowded mixed planter is not improved by a supposedly perfect pairing. Keep taller growth from shading smaller herbs and leave room to inspect foliage.
Sustainable Gardening Australia’s companion planting guidance discusses flowers as resources for beneficial insects, while acknowledging gaps in evidence for some traditional pairings. Allow a few spare herbs to flower where space permits, but do not expect a basil border to prevent pest damage.
If tomatoes share this garden, leave a distinct herb patch outside their eventual canopy. The guide to timing a Queensland tomato crop helps coordinate the larger plants before they occupy the space intended for herbs.
How do you plan the seasonal rotation calendar?
Separate two jobs: succession planting replaces ageing plants to keep leaves coming; crop rotation changes the plant family occupying a patch. Both matter, but they are not interchangeable.
For coastal south-east Queensland and similar subtropical gardens, use this starting plan:
| Season | Main job | Suggested bed use |
|---|---|---|
| Spring, September to November | Establish warm-season herbs as conditions warm | Basil in A; finish cool-season crops in B; prepare C for replacements |
| Summer, December to February | Maintain productive plants and avoid overcrowding | Harvest A; establish replacement basil in C if conditions suit; mulch vacant B |
| Autumn, March to May | Change crops as the heat eases | Finish basil in A; trial coriander or dill in B; retain C while productive |
| Winter, June to August | Continue the cooler-season sequence | Harvest B; sow a small follow-up patch in A; record where each family grew |
This is an editorial layout, not a fixed sowing timetable. Brisbane City Council includes basil among its spring planting options. Use the monthly guide for warm coastal gardens to refine local timing.
Temperate and cool districts: concentrate basil in the warm growing season. Coriander can suit cooler months, but exposed cold sites may need shelter or a different sowing window. Gardening Australia’s winter herb advice explains why southern gardeners change their herb selection as temperatures fall.
Tropical north: use the wet and dry seasons rather than copying Brisbane. The Cairns council planting guide lists coriander for April to July and basil throughout the year. Drainage and site exposure still matter.
Does changing herbs give the soil a break?
Coriander, dill and parsley belong to the same family, Apiaceae. Basil, mint, rosemary, thyme and oregano belong to Lamiaceae. Switching coriander to parsley is therefore not a family rotation.
Move the next cool-season Apiaceae patch to a different bed where practical. Include neighbouring vegetables in the record: carrots are also Apiaceae. Chives belong to the onion family and offer another group to plan around. Gardening Australia’s rotation guide explains the family-based principle.
A tiny herb plot cannot always provide long breaks. Record that limitation rather than treating a seasonal swap as guaranteed disease prevention.
How should you manage nutrients between crops?
Remove spent plants, clear weeds and check drainage before replanting. Add mature compost where soil needs organic matter, working around established roots. Keep mulch clear of stems and leave a suitable exposed strip for direct sowing.
Rotation does not replace nutrients removed in harvests. Equally, pale leaves do not automatically mean hunger: check moisture, drainage and crowding first. If using fertiliser, follow its label rather than applying a blanket recipe to every herb. Refresh exhausted container mix when needed; moving a pot changes its position, not its growing medium.
How do you manage pests and keep harvesting?
Check leaf undersides and new shoots while picking. Identify damage before acting, hand-remove visible caterpillars where practical, and clear collapsed plants promptly. Keep notes on recurring problems so the next planting can go elsewhere. Companion flowers and rotation are supporting habits, not pest-control guarantees.
Harvest small amounts regularly, leaving enough healthy foliage for regrowth. Pick parsley’s outer stalks and snip basil above a healthy leaf pair. Start another small sowing while the current crop still supplies the kitchen, rather than waiting for an empty bed.
For surplus soft herbs, wash and freeze chopped leaves with water in an ice cube tray, as described in Gardening Australia’s preserving guide. Label the frozen portions so they actually get used.
Read the related live guide to choosing herbs that cope with summer conditions before planning your next seasonal swap.
