The dark green, broad, finely hairy leaves of Crinum stuhlmannii can reach a length of 1,5 m or more. The inflorescence has a long erect peduncle and with numerous (up to 30) flowers. The perianth segment usually has a prominent deep pink keel which gave origin to the above-mentioned common name. The fruit is not beaked and the pericarp is thick and fleshy, eventually turning bright pinkish red. The fruit is not beaked.
Crinum stuhlmannii prefers a sandy soil and full sun, but will tolerate some shade. It will survive in frosty conditions, provided the bulb is kept dry during the dormant period.