Liming Brassica Beds to pH 7.2 Suppresses but Never Cures Clubroot

… more less Liming to pH 7.0–7.2 well before planting, preferably with calcitic lime, keeps clubroot spores from infecting brassica roots. Spores survive up to ~18 years, so pair liming with a long rotation away from brassicas; watch for boron shortage at high pH on sand.