Rhubarb and relatives - The Manual of Seed Saving - page 198

POLLINATION NOTES All Rumex species are outcrossers, pollinated either by wind or by insects. Wild
varieties can cross with cultivated varieties, though only with those of the same species. Docks and
sorrels blossom from late spring to midsummer, with pink/white flowers affixed to reddish stalks.
PROPAGATION All species are perennial and can be propagated vegetatively in spring or autumn. Seed
in rows or in clusters in late summer or early to mid spring. Seeds prefer exposure to light, so cover
only lightly with soil when sowing seed. Rumex species are highly variable in size, and planting dis-
tances will therefore depend upon the species; smaller species like French sorrel, wood dock, wrinkled
dock, and sheep's sorrel can be planted or thinned to 6 by 10 in. (15 by 25 cm), with patience dock be-
ing sown in 10-15 in. (25-40 cm) rows. All prefer wet sites and love regular watering. Leaves stay
tender longer and also become sourer in half shade. Transplant after three years growing in the same
spot.
Dock leaves ready for harvesting
Ripening sorrel seeds
HARVEST Dock and sorrel seeds ripen in practically every climate. Remove seedheads by cutting (this
must be done in a timely fashion to avoid seeds falling on the ground) and hang to dry. Seeds are eas-