Sow from March until August outside or use cover for earlier or later sowings. There was a problem completing your request. Please try your search again later. The type listed here is 'Mustard Red Lace', a prolific, flavoursome & spicy one! Fast growing leaf mustard with intensely, finely serrated leaves and green stems. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. The species prefers USDA Hardiness Zones 6-9. ... continuing to act as a mulch until the next crop is due for sowing, when the mustard is dug in. Our trade counter is open for ad hoc orders although we recommend customers use the 'click and collect' service wherever possible to minimise any risks to customers and employees. It is particularly attractive as the taste is less bitter and sweeter than conventional varieties. If you select the ‘Collect at Trade Counter’ option during the checkout process then we will advise you when the seed is available for collection. An extremely versatile summer hybrid cabbage with solid dark green heads and a short internal core noted for having a good sweet flavour.