One division of bamboo will start a grove or screen over time. However, if you want a privacy screen fast, we recommend planting bamboo 3 to 5 feet apart. This will hopefully allow you to have a good screen in three years. There are a lot of factors such as water, sunlight, and climate zones that speeds up or slows down the process.
Three years is about the average on this spacing, closer planting will allow you to screen or develop your grove faster. You cannot over plant bamboo. Bamboo can benefit from a fertilization program. You can safely fertilize your bamboo once it has been in the ground for one month.
A time release fertilizer will work great. Time release fertilizers allow for proper absorption in case your soil is out of PH balance. We offer some fertilizer to help with growth. We fertilize twice a year.
Once in the early spring to encourage new growth and then again during the middle of the grow season to replace any nutrients that are being depleted. Click here to see our recommended fertilizer: Our Fertilizers. Over the years a lot of myths have been told about bamboo, while it can spread under good conditions, it is not as invasive as many people would have you believe.
In colder climates an aggressive runner here in the south will hardy spread at all in comparison. We have been growing bamboo since and had experience with it long before that.
The bamboo's underground root system rhizome will spread beyond the initial planting over the years, so in the next two or three years you will need to decide on some method of containment on the sides you do not want the rhizomes to run over into.
We have constructed a page discussing multiple methods of controlling bamboo. It goes over root pruning, mowing new shoots, and in ground barriers: Controlling Bamboo. All this said and it may discourage you, but as with any plant there will be maintenance. Bamboo is very beautiful and is great in a Japanese style garden, but it will need maintenance down the road. At first it may seem to be doing nothing, but after 3 to 5 years you will have a lot of beautiful culms canes and love the foliage.
An appreciation of bamboo with black culms grew, along with their popularity as a woody plant, and following the growth in interest other species were introduced later in the century. Phyllostachys nigra is generally known to be quite controlled in its spread, being a clumping bamboo they will not usually be liable to spread except in some conditions such as if it is located somewhere exceptionally warm, cool, or in areas where the soil is very dry as it may go hunting for moisture.
Having said that, a clumping bamboo can be quite large over the course of years of growth and you should therefore leave enough room around the plant to cater for the growth within the clump, and some sources report Phyllostachys nigra as a running bamboo. Over 10 years this species could spread from 75 cm. Location and climate plays a big part in the growth of bamboo plants and therefore each one may differ in height and spread according to the localised conditions and health of the plant.
In the same country for example, some may reach a height of only three metres 10 ft. Similarly the thickness of the culm also varies and is often dependent on the height of the bamboo. Tall culms will generally achieve a wider measurement than shorter culms. A maximum diameter of 5 cm. If your plant is healthy you should see plenty of new Phyllostachys nigra bamboo shoots and culms during the growing periods as the plant mature, although juvenile plants can take a while to mature.
The emerging shoots of black bamboos are often a kind of dusky pink colouring when they first appear with the colour changing as they grow into culms. New Shoots in a Pot. Where the culms are really true black, under each node, there will be a sheath scar ring around the culm that can have the appearance of being practically white. The white ring against the shiny black culm really stands out and adds to the dramatic appearance of these bamboos.
Before the culms turn black, as new culms, they are a dark green colouring that over time turns to a mottled black and green before they finally turn to a beautiful shiny black. To turn completely black can take couple of seasons but some culms turn black quicker than others. The strength of the black colour can be dependent on the amount of full sun they receive, with full sun being a contributor to the culms turning black. So if you want shiny black culms it is recommended to locate your black bamboo in full sun.
They need a high level of sunlight as the level of light effects the colour development of the culms. To expose the black culms for best aesthetics you will need to remove branches from the lower levels of the culm once it has achieved maturity.
Overwatering and under-watering are the two most frequent issues with most house plants, and bamboo is no exception.
But of the two, overwatering is far more likely. A lot of people think bamboo needs a lot more water than it really does. They imagine it growing around swamps, ponds, or Southeast Asian rice paddies. In fact, leaving a bamboo plant in standing water is about the surest way to kill it.
If the water does not drain after a few days or a week, the roots will get waterlogged and begin to rot. Bamboo likes to be moist, but not soggy. And the dirt should be allowed to dry out or drain between waterings.
Twice a week is usually sufficient. Just make sure the plant has good drainage. Insufficient watering can also be a problem. An under-watered bamboo should recover quickly, once its thirst is quenched.
An overwatered plant with soggy, rotting roots will have a harder time. Potted bamboo will dry out faster and require more frequent watering. More importantly, bamboo pots have a tendency to get root bound. When this happens, the roots can get too impacted for the water to penetrate. This results in a very thirsty and overall unhealthy plant. Repot as soon as possible. Any fertilizer intended for grass is fine for bamboo. But I generally prefer to use some local horse manure or organic compost.
Any of these can be added a couple times a year. In time the plant should recover, and vibrant foliage will return.
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