Korean Radish (Mu)

Watch for flea beetles and root maggots, which commonly chew holes in leaves and damage roots. Use floating row cover immediately after sowing to block adults, remove heavily infested seedlings, and rotate beds so radish isn’t planted in the same spot for at least 2 years. If you see clubroot symptoms (swollen, distorted roots and wilting), don’t replant in that soil—pull affected plants and improve soil drainage and lime according to a soil test to prevent recurrence.

Harvest at about 50 days from sowing (often earlier if roots reach size sooner), and check the shoulder of the root at the soil surface. The roots should feel firm and well-filled with a noticeable diameter typical for your row spacing—if they feel rubbery or small, give them a few more days but don’t let them get overgrown. Pull one plant to confirm size; if you see woody texture at the core, harvest immediately for the best eating quality.