Tomato in August: monthly care

Tomato pruning depends entirely on the variety. Cordon (indeterminate) types grow as a single main stem and need regular attention from June through August. Bush (determinate) varieties require little to no pruning and should largely be left alone, as they fruit on side shoots. For cordon tomatoes, pinch out side shoots—the small growths that appear in the leaf axils between the main stem and branches—as soon as you spot them, ideally when they're 2–3 cm long. Do this weekly throughout summer using your fingers or clean secateurs. Removing side shoots channels the plant's energy into fruit production on the main stem and improves air circulation, reducing disease risk. If a side shoot gets away from you and grows large, cut it off cleanly at the base. In late July or early August, pinch out the growing tip of cordon plants once they've set four to six trusses (clusters) of fruit. This "stopping" ensures the plant focuses on ripening existing tomatoes rather than producing more that won't mature before autumn. In cooler summers or outdoor growing, stop after four trusses; in greenhouses, you can allow five or six. Remove any yellowing lower leaves as the season progresses to improve airflow and reduce fungal disease, but don't strip the plant bare—leaves are needed for photosynthesis. Use clean tools and avoid pruning in wet weather when blight spores spread easily.

Tomatoes have high water needs and consistent moisture is critical for healthy fruit development. Water deeply two to three times a week in dry weather, more often for container-grown plants, aiming to keep the soil evenly moist but not waterlogged. Irregular watering causes blossom end rot (black patches on fruit) and split skins. Water at the base of the plant, not overhead, to minimise fungal disease risk. Feed regularly from May through August once the first fruits begin to set. Use a high-potash liquid tomato fertiliser every 10–14 days, following the manufacturer's instructions. Potassium promotes flowering and fruiting; nitrogen-heavy feeds produce leafy growth at the expense of tomatoes. Container plants may need feeding weekly as nutrients leach out faster. Tomatoes are tender perennials grown as annuals in temperate Europe; they cannot survive frost and are hardy only to zone 10a–12b, far warmer than our climate. Outdoor plants will be killed by the first autumn frost, so harvest all remaining fruit in late September or early October. Green tomatoes can ripen indoors on a windowsill. Watch for blight (brown patches on leaves and fruit), especially in wet summers. Remove affected foliage immediately and avoid overhead watering. Whitefly and aphids can be problems under glass; use biological controls or insecticidal soap. Refresh mulch mid-season to maintain moisture levels and suppress weeds, and ensure greenhouse plants have good ventilation to prevent botrytis and other fungal issues in humid conditions.

Tomatoes have high water needs and consistent moisture is critical for healthy fruit development. Water deeply two to three times a week in dry weather, more often for container-grown plants, aiming to keep the soil evenly moist but not waterlogged. Irregular watering causes blossom end rot (black patches on fruit) and split skins. Water at the base of the plant, not overhead, to minimise fungal disease risk. Feed regularly from May through August once the first fruits begin to set. Use a high-potash liquid tomato fertiliser every 10–14 days, following the manufacturer's instructions. Potassium promotes flowering and fruiting; nitrogen-heavy feeds produce leafy growth at the expense of tomatoes. Container plants may need feeding weekly as nutrients leach out faster. Tomatoes are tender perennials grown as annuals in temperate Europe; they cannot survive frost and are hardy only to zone 10a–12b, far warmer than our climate. Outdoor plants will be killed by the first autumn frost, so harvest all remaining fruit in late September or early October. Green tomatoes can ripen indoors on a windowsill. Watch for blight (brown patches on leaves and fruit), especially in wet summers. Remove affected foliage immediately and avoid overhead watering. Whitefly and aphids can be problems under glass; use biological controls or insecticidal soap. Refresh mulch mid-season to maintain moisture levels and suppress weeds, and ensure greenhouse plants have good ventilation to prevent botrytis and other fungal issues in humid conditions.

Tomatoes have high water needs and consistent moisture is critical for healthy fruit development. Water deeply two to three times a week in dry weather, more often for container-grown plants, aiming to keep the soil evenly moist but not waterlogged. Irregular watering causes blossom end rot (black patches on fruit) and split skins. Water at the base of the plant, not overhead, to minimise fungal disease risk. Feed regularly from May through August once the first fruits begin to set. Use a high-potash liquid tomato fertiliser every 10–14 days, following the manufacturer's instructions. Potassium promotes flowering and fruiting; nitrogen-heavy feeds produce leafy growth at the expense of tomatoes. Container plants may need feeding weekly as nutrients leach out faster. Tomatoes are tender perennials grown as annuals in temperate Europe; they cannot survive frost and are hardy only to zone 10a–12b, far warmer than our climate. Outdoor plants will be killed by the first autumn frost, so harvest all remaining fruit in late September or early October. Green tomatoes can ripen indoors on a windowsill. Watch for blight (brown patches on leaves and fruit), especially in wet summers. Remove affected foliage immediately and avoid overhead watering. Whitefly and aphids can be problems under glass; use biological controls or insecticidal soap. Refresh mulch mid-season to maintain moisture levels and suppress weeds, and ensure greenhouse plants have good ventilation to prevent botrytis and other fungal issues in humid conditions.