Yes — **I would remove these agapanthus seed heads now**, unless you specifically want to collect seed. The plant in your photo has finished flowering and is now putting energy into making seed pods. By cutting the seed heads off, you help the plant put more energy back into the **crown and roots**, which supports stronger growth and better flowering next year. ## What to do Cut the whole flower stem off **right down near the base of the plant**, rather than just removing the seed head. Use clean secateurs and cut the stem as low as you comfortably can among the leaves. ## Don’t cut the leaves off yet Leave the green strap-like leaves in place for now. They are still feeding the plant and building up strength for next year. Only remove: - Yellowing leaves - Dead or mushy leaves - Frost-damaged foliage later in winter or early spring ## If you want to collect seed You can leave one or two seed heads until the pods start to dry and split. The seeds are usually black when ripe. However, agapanthus grown from seed: - May not come true to the parent plant - Can take several years to flower - May vary in colour and vigour So for most garden purposes, it’s better to deadhead and keep the parent plant strong. ## Winter care As it’s October, now is a good time to think about winter protection: - If it’s in the ground, add a light mulch around the base, but don’t bury the crown. - If it’s in a pot, move it somewhere sheltered. - Avoid waterlogging over winter — agapanthus dislike sitting cold and wet. ## Feeding Don’t give a strong feed now. In spring, when growth starts again, you can feed with a balanced fertiliser. After flowering next year, a high-potash feed, such as tomato feed, can help encourage future flowering. So in short: **yes, cut these spent agapanthus flower stems off now, right down at the base, but leave the foliage to keep feeding the plant.**