June is a fast-growth month, with harvests beginning in many gardens and heat becoming a larger factor in warm regions. Adjust planting and watering to your local frost-free season, USDA zone, and weather.

Start indoors in June

Start broccoli, cabbage, cauliflower, kale, and other fall brassicas indoors about 4 to 8 weeks before their planned late-summer transplant date. In hot regions, use shade and steady moisture for germination, and choose varieties suited to local fall timing.

Plant outdoors: cool & northern regions (zones 3–6)

In zones 3 to 6, finish planting warm-season crops early in the month and succession-sow beans, carrots, beets, lettuce, and summer greens. Start fall brassicas indoors and continue harvesting peas, greens, radishes, and early potatoes as they mature.

Plant outdoors: warm & southern regions (zones 7–10)

In zones 7 to 10, plant or succession-sow heat-tolerant crops such as okra, southern peas, sweet potatoes, eggplants, peppers, and beans. Sow fall tomatoes or begin their seedlings only where local extension guidance and frost dates support a fall crop.

Garden tasks for June

Water deeply and consistently, preferably early in the day, and replenish mulch to limit evaporation. Tie and prune tomatoes only according to the growth habit of the variety, harvest frequently, and watch for pests and fungal disease.

Regional guidance for US home gardens; always adjust to your own last and first frost dates. Page updated Aug 4, 2026.