Keep in mind when planting that Sweet Heart Red is thought of as tender, so remember to wait until your soil is warm and the night time temperature is well above freezing before moving outside. Sweet Heart Red requires a loamy, sandy and silty soil with a ph of 6.1 - 7.8 - it grows best in weakly acidic soil to weakly alkaline soil.
Will not come true from seed – sterile.
Try to aim for a seed spacing of at least
1.46 feet (45.0 cm) and sow at a depth of around
3.9 inches (10.0 cm).
By our calculations, you should look at sowing Sweet Heart Red about 20 days after your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Sweet Heart Red is a tender plant.