Lupins should be cut back at different times depending on the stage of growth and the desired outcome. Deadheading lupins is an important task to keep the plants looking tidy and to encourage more blooms. Once the flowers have faded and the petals have fallen off, it is time to deadhead the lupins. This involves removing the flower spikes by cutting them back to a healthy set of leaves or down to the base of the plant. Deadheading not only improves the overall appearance of the plant, but it also helps to redirect the plant’s energy towards producing new flowers.
If you deadhead your lupins promptly, you may be rewarded with a second flush of flowers later in the season. This is especially true for some cultivars that are known to have a longer blooming period. By removing spent flower spikes, you are preventing the plant from going to seed and instead encouraging it to produce more flowers. Deadheading can be done with a pair of sharp pruners or even by pinching off the faded flowers with your fingers.
In autumn, it is important to cut lupins back to the ground after collecting any seed pods. Lupins are known for their prolific seed production, and if left unchecked, they can self-seed and become invasive. By cutting the plants back in autumn, you are preventing them from spreading too much and also helping to maintain their overall health. Cutting back also prevents the plants from becoming too woody and encourages fresh growth in the following season.
It is worth noting that lupins are not long-lived plants and will eventually decline after several years. Generally, you can expect to replace lupin plants after about six years. However, by practicing good care and maintenance, you can help extend their lifespan and enjoy their beauty for a longer period of time. Regularly deadheading, cutting back in autumn, and providing adequate water and nutrients will contribute to the overall health and longevity of your lupins.
The timing of cutting back lupins depends on the specific task at hand. Deadheading should be done once the flowers have faded, while cutting back in autumn should be done after collecting seed pods. By following these guidelines, you can ensure that your lupins remain healthy, tidy, and continue to produce beautiful blooms year after year.
