Want bigger, juicier tomatoes this summer? There is a simple June tomato plant care technique that redirects your plant's energy into larger fruits for a bumper harvest13:26, 28 Jun 2026Updated 13:27, 28 Jun 2026From sowing the initial seed to harvesting a ripe, sun-warmed fruit, tomatoes provide a perfect blend of aesthetic appeal and a delicious yield. Whether savoured fresh in salads, simmered into sauces, or layered into a hearty sandwich, their sweet flavour makes them a perennial garden favourite.‌While many gardeners are content with a steady supply of cherry tomatoes, there's something especially satisfying about producing impressive, large fruits. Bigger tomatoes create a striking centrepiece for any dish and offer greater sweetness and juiciness.‌According to greenhouse experts at Juliana, cultivating them is simple with a quick technique that takes mere seconds. They said, "To maximise the size of your tomatoes, consider truss pruning."‌Truss pruning involves removing some of the fruit on a truss, which is the cluster where tomatoes develop, to enable the remaining fruit to grow larger."This is especially important on larger, beefsteak tomatoes, where the weight of developing fruit can damage the plants", said the Juliana team.‌In the UK, tomatoes start to ripen from mid-summer onwards, though timing differs depending on the variety, weather conditions and fruit size. In a greenhouse, tomatoes typically fruit from June through to October.The Royal Horticultural Society (RHS) notes that cordon or indeterminate tomatoes, which grow tall and require supports like wooden stakes, benefit from truss pruning. And there's a straightforward way to determine exactly when to do it.When to truss-prune tomatoesTomatoes grown indoors, whether in a kitchen or greenhouse, should be truss-pruned once they've produced seven fruit trusses. For those cultivated outdoors, consider pruning when the plant reaches four trusses.‌Pruning in June, when plants typically begin setting fruit, ensures your plant knows which trusses to prioritise well before summer's peak ripening period.How to prune tomatoesAccording to the greenhouse specialists, you should aim to keep roughly four to six tomatoes per truss on indoor tomato plants.Article continues belowThey said: "Remove the smallest or misshapen fruits, allowing the plant to concentrate its energy on developing fewer, but larger, fruits."Regularly check your plants and prune as needed throughout June."Think of it as helping your tomato plant focus its resources: instead of nurturing eight or 10 smaller fruits, it channels more sugar, water and nutrients towards just four or five, yielding bigger, more flavoursome tomatoes.