Start seeds indoors six weeks before last frost date.
Try to aim for a seed spacing of at least 0.78 inches (2.0 cm) and sow at a depth of around 0.39 inches (1.0 cm). Soil temperature should be kept higher than 12°C / 54°F to ensure good germination.Plant to the first set of true leaves to promote strong root growth.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Granny's Heart is a tender plant.Family heirloom. The grandmother crossed a beefstake and a plum tomato (of unknown parentage) to breed this tomato. Dates back at least to the 1950’s.