How to grow Sweet william 'Mrs Roxburgh'
Keep in mind when planting that Mrs Roxburgh is thought of as hardy, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea).
Growing Mrs Roxburgh from seed
Transplanting Mrs Roxburgh
As Mrs Roxburgh is hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.
Harvesting Mrs Roxburgh