June is the garden’s first big “payoff” month: the first harvests arrive while heat-loving plants grow rapidly. You need to harvest, maintain, and already think about the autumn crop all at once.
The first harvests
- 🧄 Garlic, shallot: once about a third of the leaves have dried, lift on a dry day
- 🟢 Peas: harvest continues — the more often you pick, the longer it keeps producing
- 🥗 Early lettuce, radish: the first rounds are finishing — sow something new immediately
- 🍓 Strawberries: peak season, harvestable daily
The last sowing windows and preparing for autumn
- 🫘 Beans, sweetcorn: still safe to sow until the end of June
- 🥬 Kohlrabi, beetroot, carrot (for autumn): sow now for a fresh autumn harvest
- 🥦 Cabbage, broccoli, kale (autumn): seedlings need starting NOW indoors
June tasks overview
| Plant | Task | Note |
|---|---|---|
| Garlic, shallot | Harvest | When 1/3 of leaves have dried, lift on a dry day |
| Peas, early radish, lettuce | Continue harvesting | Sow something new immediately into freed space |
| Beans, sweetcorn | Last sowing window | Still safe to sow until end of June |
| Kohlrabi, beetroot (autumn) | Outdoor sowing | Start now for autumn harvest batch |
| Cabbage, broccoli (autumn) | Indoor seedling | Needs starting now for August transplanting |
| Tomato | Suckering, tying | Remove side shoots weekly, and feed |
| Cucumber, courgette | Continuous harvest | Frequent picking encourages more fruiting |
Plant care during peak growth
- 🍅 Tomato: weekly suckering and tying/feeding
- 🥒 Cucumber, courgette: frequent harvesting encourages more production
- 💧 Watering is now most critical: on hot days may be needed daily
- 🪴 Top up mulch where it has thinned
Freed-up beds and crop rotation
When a bed frees up (e.g. after garlic or peas), this is where crop rotation planning comes in: what can go here without repeating the plant family just harvested?
Summary
June is a three-front month: harvest the first crops, sow the last “still time to mature” plants, and already start autumn seedlings. Meanwhile existing plants need intensive peak-season care.
❓ Frequently Asked Questions
Why should garlic be harvested exactly when about a third of the leaves have dried? Up to that point, the garlic bulb is still actively gathering nutrients from the green leaves — pick too early and you get small, underdeveloped cloves; wait too long and the bulb falls apart underground as the wrapper skins rot; the one-third point is the optimal balance between maturity and intact wrappers.
Why start autumn cabbage-family seedlings indoors NOW in June, when they’re only transplanted in August? A cabbage-family seedling needs 6-8 weeks to grow to transplant size — counting back from the August transplant date, the seed needs to be sown exactly in June for the seedling to reach the field at the right stage of development.
Why do tomatoes need weekly sucker removal? New shoots (suckers) form in the leaf axils and compete with the main stem for nutrients and light — left to grow, the plant’s energy gets scattered across many smaller shoots; weekly removal concentrates the plant’s strength on the main stem’s fruit.
Why shouldn’t you plant the same plant family in the same spot when a bed becomes empty? Members of the same plant family consume the same nutrients in similar proportions and host the same soil-dwelling pests and pathogens — repeating the same family in the same spot year after year depletes specific nutrients and lets pest populations build up.