Phyllostachys Nigra, also known as Black stemmed bamboo, is a monocarpic species, meaning that they only flower once in their lifetime, this process is also known as gregarious flowering. When not in seed, the plant is reproduced in clones from rhizome cuttings. Many clients have noticed their Nigra Bamboo producing seed through 2023, 2024 and 2025 and this phenomenon is happening all over the world within this short window. While this process does lead to the eventual death of the majority of the rhizome system, the seeds can easily reestablish over a large area causing potential nuisances to neighbours.
This die-off begins with yellowing of many leaves, some canes may also die back while the plant gathers its energy for seed production. Cane canopies will loose density, and show large clusters of seeds in replacement of the leaves. Once the seeds have finished growing, the plant will loose all leaves and begin to die off. However, the seeds are very much still viable and can be produced in the tens of thousands by plants that are only 4m sq. It also worth noting that not all rhizomes will die, and that they can stay dormant for up to 18 months before regenerating.
At Alien Plant Control Ltd, we recommend regular inspections for signs of flowering or weakening in the stands. If your bamboo is showing unusual growth patterns, it could be entering its monocarpic phase- an opportune time for complete removal to prevent any potential seeding spread. Our lengthy guarantee options cover this threat for your peace of mind, operatives will reguarly visit to conduct checks and spray suitable products to control the infestation.
Our expert team uses environmentally safe methods, including rhizome excavation and targeted herbicides, to fully control the invasive bamboo without harming surrounding shrubs and lawns. Serving all of England, we are here to help restore your garden's balance and protect your investment.
Don't let Phyllostachys Nigra turn your dream garden into a nightmare, get in touch for a free consultation.