I want to raise my flower bed without losing my plants any suggestions

oh my aching back! ha - you'll have to get EVERYTHING ready ahead of time. Dig up plants and place them on a tarp covered with newspaper - IN THE SHADE. Be sure you have MOST of the ROOTS. If you can't get your new bed "raised" in a day, you'll have to loosely cover your plants with newspaper or a sheet after you've lightly watered them. GET that NEW bed raised and filled with good soil, mixed with peat moss and some CLEAN sand...fill new bed, water, let it soak in, plant your plants. You can knock off a little of the "old" dirt and spread the roots GENTLY. A little miracle gro in the morning will help with transplant shock. Water AT the root (good time to put in a soaker hose!) when they look wilted ... then just once a week. Good luck

You could remove your plants, add a raised bed in the same area, add soil to fill the raised bed, then replant your plants afterwards. You should be able to save all of them by doing this.

Make sure you put your plants in pots while you are working on building up your beds. If you don't remove them you will most likely loose them from having too much soil around them. Plant them in pots with the soil from the garden. If you plan on having the work done quickly you don't need to worry about the size of the pot as long as the root ball and some soil can fit in it. I have done this before with ferns, hostas and Lilly of the valley and actually had them in the pots for about two months until I knew where I was going to put them in the garden after putting in all the new plants and they are healthy as a horse this year and twice as big as last year.