Japanese Knotweed or Not

Tall trees

can anyone let me know if this is Japanese Knotweed ?

Alan Clark2 in Liverpool

No, it is Himalayan Balsam. A weed, but easily pulled out by the roots.

Tall trees

Brill thanks Alan   

Welshonion

Don't let it seed as it will throw them all over the place.

Dovefromabove

It can project its seeds over twenty metres!  it is also causing problems on river banks leading to erosion, and damages the ecology by smothering native plants.

It's only saving grace is that the seedlings are pretty easy to recognise and pull up once you get used to them.

Keep it under control 

https://www.rhs.org.uk/advice/profile?pid=480 

Tall trees

Now I remember the plant, dosnt it pop when you touch the seed, thanks for all your help.