What can I do to keep deer away

I live in Zone 7, SW Virginia rural area. We have a healthy deer population.
I have a 20 X 30 flower garden which was established 5-6 years ago.
When the local acorn crop is good the deer aren't as bad but that seems to have changed also.
I have tried Lowe's "Deer Away" and other stinky products that are supposed to keep deer / rabbits away but it seems to not work.
I started planting only "Deer Resistant" varieties of plants. I followed a Univ. of Michigan file, I found, which listed "deer resistant plants" sorted by most effective. My Knockout Roses used to be safe but the last two years they have been eaten down. The only plants they have not eaten are my butterfly bush, iris, red hot pokers and lavender bush. This year they ate my Stella D'Oro's down to nothing. I could only plant those but it would be an uninteresting garden.
Sorry for the long rant but I am frustrated because I like gardening but don't like seeing the results of my labor go for nothing.

Can anyone with similar problems help me. Aside from chaining hunting dogs around my garden, when can I do ?

I posted a picture of my garden before the deer attack. Those knockout roses on the end, and Stella D'Oro on the left have no blossoms on them at all now

Thank you

Phillip

We are also in SW Virginia ... with property surrounded by forest on all sides. We tried lots of things, but finally found that mothballs dropped on the ground beside the plants really works. Previous owners planted lots of hosta, which were quickly eaten down by Bambi and crew, but they don't touch them at all now. We also put them nearby daylilies with good results.

Bear droppings.

Thank you for the replies. I appreciate the information.
I can probably get mothballs easier than Bear droppings.

You might have no choice but to make your deer delicacies physically inaccessible to them. A couple years back, I surrounded my vulnerable plants with tomato cages, then covered those with 3/4" bird netting anchored into the ground with garden staples (6-inch ones, pounded all the way into the soil). The netting is virtually invisible from a distance, and still allows bees inside to pollinate. The tops of the cages had to be covered so the deer couldn't extend their noses and mouths down through the tops to feed that way. If the deer were persistent, they risked getting a mouthful of netting, which discouraged them.

This worked well until the netting began to deteriorate in the seasons that followed, and the deer found the weakened areas and managed to tear holes in them and get at the plants. This required completely replacing the netting after a year or two.

The other drawback was that birds foraging on the ground could get tangled up in the netting and if not rescued in time, died there.

This wasn't the ideal solution, but it helped for awhile. If you use this method, be watchful for bird life and any birds that get caught in the netting must be cut loose from it immediately. Small holes in the netting can be repaired by covering them with swatches of new netting and stitching around the edges. This is a lot of work and time consuming, but the deer WILL leave those plants alone.

I have been using LIQUID FENCE recently, and it has been deterring them. That has to be reapplied after watering or after a rain shower.

I never had a deer problem until our neighbors started feeding them. Neighbors need to be educated about the consequences of feeding deer in residential areas where people have gardens. Then, they have to CARE about their neighbors enough to refrain from encouraging these pests. Bambi isn't cute. Bambi is destructive!

I should add to the above that if you use this netting over metal cages method, you will need to occasionally lift the garden staples out so you can weed around the plants inside. Weeds will continue to grow around the bases of those plants, just as they would around any other plants. After weeding, the garden staples can be reinserted and pounded back into the soil to re-secure the netting. This is not a low-maintenance method of protecting your plants, but desperate situations require desperate solutions.

I decided against the mothballs because I have dogs who like to sniff around my garden.
I don't want to put up fencing because I think that will make my front garden look like a fortress, not a garden.
I will try the Liquid Fence, thanks.