Posted: 02/07/2015 at 20:10
If you need height christine - take a look at the bulb suppliers online. Alliums are a good way to fill gaps at this time of year as they have height but not too much spread and they aren't expensive. For a few pounds you can get 50 or 100 bulbs and they take little attention. You'll get them in autumn -plant them where you want them to go and wait for them to come up next year.
You mentioned hostas - they can be propagated by division. You can do that later in the year or in spring. Lift the plant and split it with a spade or knife into decent sized pieces. You can replant them if conditions are good, or pot them on to plant later.
It's worth taking a bit of time to look up the conditions and propagation techniques for the plants you have. Plenty of info online or in libraries if you don't want to buy books. I'd also agree with Lyn about removing those two little beds and making more of the corners of your plot.