Cauliflower

Brassica oleracea var. botrytis

Cauliflower is a mild, dense brassica grown for its compact white curd: proliferating, undeveloped flowering tissue that has stopped before forming an ordinary loose flower head.¹

The curd is not a single flower but a tightly packed mass of immature flower stalks and buds. White cultivars are kept from sunlight so chlorophyll does not turn the curd green; purple, green, and yellow cultivars let those pigments show, and Romanesco arranges the same flowering growth into repeating pointed spirals.²

Cauliflower is a cool-season crop that fits the Northeast particularly well as a late crop. Maine guidance lists it for spring and fall plantings, while Penn State recommends late-season plantings so the curd develops before autumn frost.³ It is more sensitive to temperature swings than its close relative broccoli: premature reproductive growth can produce small or irregular heads, a problem often called buttoning.⁴

The entire curd is edible, along with the tender leaves and stalks surrounding it. Its pale color and mild flavor come from the absence of leafy chlorophyll rather than from a different plant family, while its brassica character includes glucosinolates, sulfur-containing defense compounds that can become more noticeable as the vegetable is cut and heated.⁵

Maine’s recommended garden varieties show how much the familiar white head is only one expression of the crop: the state’s variety guide also lists purple ‘Graffiti’ and yellow ‘Cheddar’ alongside white cultivars. These colors come from pigments accumulating in the exposed curd, while the traditional white type is kept shaded by its own leaves. Extension guidance treats cauliflower as a spring and fall crop in Maine, and cool-season timing matters because heat and other stresses can interrupt the slow, compact development that makes a firm head.⁶