Dwarf French Bean Purple Queen - Phaseolus Vulgaris. Purple Queen has plump purple pods that turn completely green after cooking. Produces very tasty beans. For an early harvest sow in a greenhouse or pre-sow in pots. Beans thrive in the warmth. Too much wind and particularly night frost can be very harmful. Sow or transplant after mid-May in the garden. Row distance approx. 40 cm with a bean every 10 cm. It is a bush bean, so support is not necessary. Sluis Garden seeds.