Hi, Can anybody advise me how & when to feed clematis & also roses. I fed my roses with Toprose in late March but am unsure when & how often I should feed during the summer & what to feed them with. Some are newly planted in pots, others are well established in the ground. Also I fed my clematis with Sulphate of Potash about 4 weeks ago, some now have buds on, should I be feeding them through the season with a liquid feed, if so how often? Many thanks.