Grows well in ordinary garden soil. Prefers a moist well-drained soil in sun or semi-shade. A greedy plant inhibiting the growth of nearby plants, especially legumes. Very closely related to A. annua.

None known

Seed - best sown in situ as soon as it is ripe in the autumn, though it can also be sown in situ in the spring.

Cornfields, usually on calcareous soils.