Posted: 05/09/2014 at 20:03
No, don't plant them out Keep in those pots outside until frosts beckon then overwinter in greenhouse. Don't pot on now.Rudbekias are hardier but still leave until early spring. Rudbekias can then be planted out
Echinaceas are different, ESP the new varieties. You should pot on in spring and plant out when growth is vigorous or delay planting out and pot on again. Dont let them flower before mid summer....let them develop a good strong root system first. Keep well watered. After mid summer let them flower and they should then flower right through to the frosts.