Tomatoes are demanding plants that need proper nutrients during their early growth phase in April, as they focus on developing strong stems to support heavy fruit. Shane Genziuk, an expert and founder of Ground to Ground, suggests using used coffee grounds as a natural fertilizer. Coffee grounds are rich in nitrogen, which promotes healthy foliage development and creates mildly acidic soil conditions that are beneficial for tomato growth. Additionally, coffee grounds serve as a natural pest deterrent, helping to repel slugs and insects attracted to the plants. However, caution is advised as overusing coffee grounds can lead to excessive leaf growth at the expense of fruit production. The recommended amount is half a cup to one cup of coffee grounds per tomato plant, applied once a month during spring. This method will help ensure that your tomatoes develop stronger stems capable of supporting larger fruit during the summer months.