A fascinating plant for a wild garden with many long arching stems holding compound heads of numerous bright red flowers, "giganteus" refers to the size of the plant! The unopened flower buds, which are very similar to Dianthus carthusianorum, bear a marked resemblance to a returning space capsule!
For best results, seeds are sown directly into the ground where required in the spring. Alternatively, sow in late winter/early spring in gentle warmth, 15-20 degrees C. Prick out into small 3 inch or 7 cm. pots and plant in final position when the plants are established.