As a gardening and landscaping expert, I can assure you that Agastache, commonly known as hummingbird mint or anise hyssop, is not considered invasive. However, it is important to note that its flowers have the potential to self-seed and spread if left unchecked.
To control the expansion of hummingbird mint, you may choose to cut back the flower heads at the end of the season before they have a chance to go to seed. By doing so, you can prevent the plant from spreading beyond its desired boundaries. It is advisable to remove the flower heads carefully to avoid scattering the seeds unintentionally.
Despite this self-seeding nature, hummingbird mint is generally not classified as invasive. It tends to stay within its designated area and does not aggressively invade other parts of the garden or landscape. Its ability to attract pollinators, particularly hummingbirds, makes it a popular choice for many gardeners.
In my personal experience, I have found that leaving the stalks of hummingbird mint standing until the following spring can be beneficial. The dried flower stalks provide winter interest and can also act as a marker for the plant’s location, especially if you want to ensure it doesn’t get accidentally removed or mistaken for a weed during cleanup.
If you are concerned about the potential spread of hummingbird mint, you can also consider deadheading the flowers throughout the growing season. This practice involves removing the spent flower heads to prevent seed production. However, keep in mind that this may reduce the amount of seeds available for self-seeding, which can limit the plant’s ability to spread naturally.
While hummingbird mint does have the potential to self-seed and expand, it is not typically considered invasive. With proper maintenance and control measures, you can enjoy the beauty and benefits of this plant without it becoming a nuisance in your garden or landscape.
