How To Grow Ornamental Grasses

By AHmed Hajouj.


Ornamental grasses have become extremely popular in the past ten years or so, and if you buy them at a garden center they are kind of pricey. Learning how to grow them yourself is actually quite easy. They can be grown from seed, but I won’t pretend to be an expert at that for several reasons. One, I don’t know anything about growing them from seed, and two, I have no desire to propagate them from seed because seedlings require too much care.



The easiest and most effective way to propagate them is through simple division. Of course you will need at least one parent plant of each variety that you would like to grow. If you shop around you might be able to find some 4″ inch pots at a fair price.



One of each variety is good for a start. I find that the best time of the year to divide them is in the spring, just before the new growth emerges. If you buy the stock plants in the early spring, you might be able to divide them right away. If you buy them at any other time of the year, just plant them in your garden or other suitable location, knowing that you are going to dig them up in a few months, or a year or so.

When spring arrives you can divide them at any time as long as they are not well into putting on new growth. The earlier the better. To divide them simply dig up the root mass and start dividing it into pieces. The divisions do not have to be to be very large. It’s difficult to describe, but as long as you have some roots, the new plant is likely to grow. 

If you have small young plants you can probably just tear the root mass apart with your hands, but if the root mass is very big then you are going to need some tools. You might need some heavy duty tools!



Last spring I divided several grass plants that had been in my landscape for a few years. When I dug out the root mass it was much larger and more dense than I expected. Using a very good digging spade and some real elbow power I was able to chop the root mass into quarters, and I replanted the quarters back into my landscape. That still left many clumps that I wanted to divide into very small plants that I could pot up in 2 quart containers. The root mass was too dense to tear apart with my hands, so I literally got a hammer and a 4″ wide mason’s chisel and chiseled off pieces. It worked and I now have a couple of hundred beautiful little grass plants in 2 quart containers.



Since then I have talked with a friend of mine who works for a large wholesale grower, and he told me that you never want to let an ornamental grass plant get that big if you intend to divide it. He said they plant small divisions in the field in the spring, and dig them up the following spring and divide them again. He assured me that if you get them just 12 months later, they can be easily torn apart by hand.



That sounds like a lot more fun than what I went through!

Transplanting Tips

By Ahmed Hajouj.


Early spring is a great time for transplanting trees and shrubs, but you must do so before they wake up. Transplanting a plant is a very traumatic experience for the plant if it is awake. It’s like doing surgery on a person while they are awake. Dormancy starts in the fall as soon as you experience a good hard freeze, and the plants remain dormant until the weather warms up in the spring. This is when you should transplant, while the plants are dormant.

You can transplant in the spring up until the plants leaf out. When the buds are green and swollen you are usually safe to still transplant, but once the leaf develops, you should wait until fall. When transplanting you can dig the shrubs out bare root, just make sure they are out of the ground for as short a time as possible, and keep the roots damp while out of the ground.

Make sure there are no air pockets around the roots when you replant them. When possible, it is always better to dig a ball of earth with the plants when you transplant them. The rule of thumb is 12″ of root ball for every 1″ of stem caliper. If the diameter of the stem of a tree is 2″, then you should dig a root ball 24″ in diameter. 

Don’t be afraid of cutting a few roots when you transplant. Just try not to cut them any shorter than the above guidelines allow. Cutting the roots will actually help to reinvigorate the plant. It’s a process simply known as root pruning. When the roots are severed, the plant then develops lateral roots to make up for what is lost. These lateral roots are more fibrous in nature, and have more ability to pick up water and nutrients.

Some nurseries drive tractors over the plants in the field with a device that undercuts the roots of the plant just to force the plant to develop more fibrous roots. This makes transplanting the plant the following year much more successful, and makes for a stronger and healthier plant.

The old timers root pruned by hand by forcing a spade in the ground around their plants. If you have a plant in your landscape that is doing poorly, a little root pruning while the plant is dormant could bring it around. It’s worth the effort.