The ‘Connover’s Colossal’ is a superb asparagus variety that features bright green spears and deep purple tips, produced in an exceptionally high yield. The crowns are best when planted between March and May, and though a few spears can be cut, the following year, they are best left for two years so that they can grow into a strong and robust plant. Awarded the prestigious RHS Award of Garden Merit ‘Connover’s Colossal’ is also a firm customer favourite.
Your asparagus will arrive as bare-root crowns and should be unpacked and planted as soon as possible. Traditionally planted in spring, these crowns can also be planted at any point from autumn onwards. Plant your crowns in a sunny location, sheltered from strong winds and well prepared soil that ideally has had lots of manure or compost added in the previous autumn. Good drainage is necessary, and if your soil is too heavy or wet it would be advisable to grow them in a raised bed.
Prepare your bed by removing all the weed and digging in lots of well-rotted manure or composted organic matter. When planting, dig a trench approximately 30cm wide and 20cm deep and work a little more organic matter into the base of the trench. Using the excavated soil, create a 10cm tall, arched ridge down the length of the trench and sit the crowns on top. Allow 30-45cm between each plant. Spread the roots out to form a star-shape and cover them with the remaining soil, leaving the tops of the crowns just visible. Subsequent rows should be at 45cm intervals with staggered planting. Immediately after planting, water thoroughly and mulch with a generous layer of composted organic matter. During the growing season keep well fed with general purpose fertiliser and make sure the beds stay free of weeds. The first spears will appear soon after planting but it is important that they are not cut and allowed to develop into feathery stems throughout the summer. They can be cut back to above ground level once they have started to die back in autumn. Before the new spears appear the years following make a ridge of soil over each row and apply a dressing of general purpose fertiliser. If you can, try to resist harvesting the spears, which appear in the second year too, as the plant should be left to develop a robust crown before you begin cutting the spears in their third year.
Hardiness: Fully Hardy
One bag contains 3 crowns.