Lily, I have no personal knowledge of this saw. I took a look at it on Amazon web site, and it has pretty good reviews, except that a number of people could never get the blade installed. You might take a look at those reviews. THAT SAID, and not knowing what kind of ornamental grass you're dealing with, I wonder if you could cut the stalks with loppers. Also, is cutting the stalks going to kill the plants, or will they simply spring up again? Would it be feasible to use herbicide? Best luck.

I love cordless tools! I have a cordless pole saw and it is quite powerful, although I have never used it on grasses. It's probably too short a blade length. My grasses are not terribly big and my manual hedge shears usually are fine. Cordless Pole Saw But as far as power goes, it is plenty powerful and I see no reason why a similarly powered cordless hedge trimmer wouldn't be powerful enough for grasses. I can cut 4" branches with the cordless pole saw with no problems. I also have the B&D cordless trimmer and blower. They all share 4 niCad interchangeable batteries. If I run out of juice on a large job, I just reload a fresh battery. The trimmer, for example, can trim all my beds (15 or so? 1 acres worth) with one battery. The blower isn't as effective. Two batteries are needed to clear pine needles or debris off my 75' driveway and it is not effective on the lawn, but is extremely handy to use for frequent light touch-ups on walkways, etc. I'm a big fan of cordless lawn tools. I hate gas and cords. I also use a Neuton battery mower. At some point I might have to invest in new batteries but so far all is great for the past 3 seasons with all my cordless tools.

globe- You can give them a haircut with a sharp pair of scissors. When propogating grasses it is something we do probably twice while they are rooting into their cell trays or small pots. The pruning will encourage a bushier growth. Jack

A regular rake will work but when you are fine cleaning leaves etc from around plants anyway, a hair pick is handy, does it quicker and more thoroughly. Stipa tenuissima definitely looks better raked, its good to rake out the seed heads in late summer when they start looking ratty, you end up with a big globs of the fluffy stuff and reduce seeding about. Many cool season grasses are better raked as opposed to cutting back. If you cut back they will sometimes look like chopped off bad haircuts for a long time, especially mature specimens. I decide based how any given one looks as to whether to leave alone, rake or trim any dead tips or sometimes dead leaves laying flat on the ground around the edges. If a cool season grass looks good, I wouldn't consider trimming it or if a warm season grass is evergreen growing in mild winter areas like California, I wouldn't trim those either (many people write in asking that on the O.G. Forum). If the whole grass has dried up dead leaves in spring-- dead is dead-- trim it low. Often its good to do some dethatching on the cut 'stump' to give new growth some room, sometimes I decide its better to divide it. I always trim back warm season grasses here in zone 7, except for the some of the muhly grasses which you can do every three years or so. If you are growing grasses from seed its good to trim small grasses back about half to encourage tillering which means more roots and thicker plants sooner.