|
Japenese Knotweed or not?
Hello everyone, nice to be here.
I think I have some Japanese Knotweed but am not sure. I have been googling images of it but it's not quite the same as what it in my garden. The stems are red, a very deep red with no other colour or shading whatsoever. They are not bamboo like (no line around the stem where each leaf stems off), where the leaves appear it's smooth and uninterrupted along the entire length. The stems are more woody, sapling-like and not hollow. It has not flowered at all. The leaves are heart shaped and quite large, but are now taking on the weathered and damaged appearance of a dock leaf. I spotted this plant several months ago and is has not grown much at all since. It's longest stem is about 4ft. I would post a pic but it's dark now. Any clues anyone? |
Quote:
regards Lannerman. |
Japenese Knotweed or not?
On 10/26/11 10:54 AM, Blackfingers wrote:
Hello everyone, nice to be here. I think I have some Japanese Knotweed but am not sure. I have been googling images of it but it's not quite the same as what it in my garden. The stems are red, a very deep red with no other colour or shading whatsoever. They are not bamboo like (no line around the stem where each leaf stems off), where the leaves appear it's smooth and uninterrupted along the entire length. The stems are more woody, sapling-like and not hollow. It has not flowered at all. The leaves are heart shaped and quite large, but are now taking on the weathered and damaged appearance of a dock leaf. I spotted this plant several months ago and is has not grown much at all since. It's longest stem is about 4ft. I would post a pic but it's dark now. Any clues anyone? Your description sounds like Persicaria capitata, which is also commonly called a knotweed and used to be classified as Polygonum capitatum. Another common name is pink clover although the leaves are not clover-like at all; this name comes from flowers, which resemble pink versions of white clover. It does look forlorn as the weather gets cold but does not get truly dormant until the temperature drops below freezing. The plant itself (stems and roots) should be hardy to about 15F. In cold weather (above freezing), the leaves turn red; they will return to green in the spring. P. capitata can be quite drought tolerant, but it will accept regular watering. It is also tolerant of part-shade although it does best in full sun except in the hotest climates. My front lawn and my rose bed in back are planted with P. capitata. It forms a dense mat about 2-4 inches thick, so dense that very few weeds will grow in it. I need to trim the edges of where it grows about 2-3 times a year. -- David E. Ross Climate: California Mediterranean, see http://www.rossde.com/garden/climate.html Gardening diary at http://www.rossde.com/garden/diary |
Quote:
  |
Co-indidentally there was a feature on Japenese Knotweed on The One Show just after I posted this thread.
Looking at the footage, these seem to be different stages. A young version where the stems are very red and slim (like the plant in my garden) and then it starts to appear bamboo like. Confused, yes. It is a very small patch, but we are planning on building extension on that land and need to know if there is anything in there that will potentially damage our plans/building. Thank-you for looking |
Thank-you, but I don't think it's Persicaria capitata as it has not flowered at all.
I googled it, nice plant. I have posted some pics which might help. Thank-you |
Japenese Knotweed or not?
Blackfingers said:
lannerman;940310 Wrote: Hi Blackfingers, without a photo its difficult to say what you have ? but if the stems are not hollow and they are upto 4ft tall, then its not Japanese Knotweed. any chance of a picture when its light ?? regards Lannerman. Here are some pics [image: http://img.photobucket.com/albums/v1...oth/mysterypla nt2.jpg] [image: http://img.photobucket.com/albums/v1...oth/mysterypla nt1.jpg] Probably Red Osier Dogwood (Cornus sericea). Some sort of dogwood, at least. -- Pat in Plymouth MI "Yes, swooping is bad." email valid but not regularly monitored |
Japenese Knotweed or not?
In message
, Pat Kiewicz writes Blackfingers said: lannerman;940310 Wrote: Hi Blackfingers, without a photo its difficult to say what you have ? but if the stems are not hollow and they are upto 4ft tall, then its not Japanese Knotweed. any chance of a picture when its light ?? regards Lannerman. Here are some pics [image: http://img.photobucket.com/albums/v1...oth/mysterypla nt2.jpg] [image: http://img.photobucket.com/albums/v1...oth/mysterypla nt1.jpg] Probably Red Osier Dogwood (Cornus sericea). Some sort of dogwood, at least. I'm not sure. It's clearly not Fallopia japonica (Japanese knotweed), but while it looks rather Cornus-like, the leaf veins of Cornus sericea (and Cornus sanguinea) are usually more swept forwards. I'd go for some other sort of dogwood. -- Stewart Robert Hinsley |
Japenese Knotweed or not?
On 10/26/11 5:30 PM, David E. Ross wrote:
On 10/26/11 10:54 AM, Blackfingers wrote: Hello everyone, nice to be here. I think I have some Japanese Knotweed but am not sure. I have been googling images of it but it's not quite the same as what it in my garden. The stems are red, a very deep red with no other colour or shading whatsoever. They are not bamboo like (no line around the stem where each leaf stems off), where the leaves appear it's smooth and uninterrupted along the entire length. The stems are more woody, sapling-like and not hollow. It has not flowered at all. The leaves are heart shaped and quite large, but are now taking on the weathered and damaged appearance of a dock leaf. I spotted this plant several months ago and is has not grown much at all since. It's longest stem is about 4ft. I would post a pic but it's dark now. Any clues anyone? Your description sounds like Persicaria capitata, which is also commonly called a knotweed and used to be classified as Polygonum capitatum. Another common name is pink clover although the leaves are not clover-like at all; this name comes from flowers, which resemble pink versions of white clover. [my prior text snipped] I just saw the links to your photos in another thread. No, that is definitely NOT Persicaria capitata. Why did you start a discussion about a different plant in the thread about your vines? -- David E. Ross Climate: California Mediterranean, see http://www.rossde.com/garden/climate.html Gardening diary at http://www.rossde.com/garden/diary |
Quote:
Lannerman. |
Quote:
Thank-you for your input. As far as I know I haven't started any other discussions ....... |
Thank-you Janet, mind is at rest now.
|
Quote:
|
| All times are GMT +1. The time now is 03:28 PM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
GardenBanter