This is definitely a project that you can do yourself and save a lot of money. There are a number of plants that tolerate dry soil, but do you need to stabilize the bank as well? How steep is it?
The first step I would take, presuming that it isn’t too steep, is to amend the soil with compost. See if you can get some from your town at low cost – also see if you can borrow a friend’s pick up truck and haul it yourself. If the bank is very steep, the compost may just run off, since it is lighter in weight than the soil, so you’d want to take steps to prevent losing it. The compost will help with moisture retention and also make planting more enjoyable.
As for the plants, take a look at this list of drought tolerant plants for North Carolina: http://www.bae.ncsu.edu/programs/extens … m/ag508_3/ I would opt for a mixture of shrubs and ground covers. When you say "blue rug plant", do you mean juniper? I think juniper is a good choice, because it tolerates dry soil, and I would use the ones you already have but surround them with a drought tolerant sedum, like Sedum ‘Angelina’ which is a beautiful golden color. Be creative, use what you already have, and make lists so that you can be organized when you call nurseries to buy plants. The more you can buy in one place, the better, as they may offer quantity discounts.
Most importantly, remember that these plants are only drought tolerant, not drought proof. They’ll need water as they are getting established, and, once established, will look better if they receive an occasional watering.
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Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.