Posted: 10/07/2016 at 11:29
Hi - answer to all the questions. Yes, it is watered well. I knew when I put it in the container I would have to water it regularly. It gets a good soaking at least once a week, and when it is warm, it gets more often. I often worry if I am over watering, but read somewhere once it is virtually impossible to over water a bamboo (assume that's not totally correct). I also have been watering it when its been pelting down with rain!
I've already given it a dose of grass fertiliser which has added iron in as well. No change. I put in the dosage as per instructions on the bottle. Only did one watering can of feed as didn't want to over feed it. Says to does every six weeks.
The container is a square concrete one which is 0.5m x 0.5m. Not overly big, but then when I planted it, it didn't fill the container at all.
Its been in the container for just over one year (planted it in May last year 2015).
I use rain water from the water butt. Don't use tap water (I'm on a meter).
When I planted it, I used 50:50 John Innes No 3 and well rotted manure.
In the first year, it threw up loads of new canes. This year only one.
In terms of being a runner or a clumping type - I've read conflicting things. Some sites say it is a runner, and others (like the RHS) say it is clumping, with others saying the people think its a clumper but in reality, its a runner. Very confusing. I did read that people who have heavy soil tend to keep their bamboos contained because even running bamboo find it difficult to spread, whereas light sandy soils even clumping bamboo will spread quite quickly. I'm on light sandy soil (Bagshot sands) so do fear putting it in the ground.