Suntastic F1 Sunflower Seeds. This 2014 AAS Bedding Plant Winner is a superb sunflower for containers or gardens. You will love the large number of flowers each plant produces - up to 20 or more 15 cm (6") wide flowers per plant in three successive bloom periods. Plants are naturally dwarf and compact and are very early flowering. Ideal for the patio, mass planting in beds or for the annual border.