How to grow Rock cress 'Royal Red'
Royal Red is generally regarded as a hardy plant, so this plant will survive close to or on freezing temperatures.
Growing Royal Red from seed
For optimal germination, soil temperature should be a minimum of 10°C / 50°F.
Transplanting Royal Red
Royal Red is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.
Harvesting Royal Red