The most common invasive plant species in NH

[Verseau]

Originally Posted by Valerie C

I thought it would have been either bittersweet or purple loosestrife... both beautiful but so so invasive!!

I've always thought that purple loosestrife was beautiful... I love the fields in August that are covered in loosestrife and goldenrod.

[buck naked]

I've noticed it on the sides of the highways. I always thought it was a good looking plant.


My guess was the burning bush. It is no longer sold in garden shops across the state because it is so invasive and kills other plants that surround it.

[GraniteStater]

Originally Posted by buck naked

I've noticed it on the sides of the highways. I always thought it was a good looking plant.


My guess was the burning bush. It is no longer sold in garden shops across the state because it is so invasive and kills other plants that surround it.

I have seen it between exits 24 and 26 on I-93. Yes, it is knotweed. It often develops in fill construction soil as well. It is harder to identify now that the leaves have blown off the plant.

[GraniteStater]

Knotweed also grows alongside roadways. If one has a larger acerage property with wooded lands that have problems with some invasives consult a forester (preferably one that is certified). The best method of action is to do some selective cutting or timber stand improvement along with removing any invasives. Doing TSI is generally advisable because it results in better regeneration of higher quality tree types if the soils are of good quality.