I believe that a local nursery around you could give the best products and suggestions. 😊
My cousin uses a vegetable peeler on a bar of Irish Spring soap and scatters the shavings around her plants. There's also a product called Bobbex that works really well if you have something that is very precious to you.
I read this from Gma Kirk: A farmer gave me a gross recipe for repellent...but it works. cup or two of urine, tablespoons of crushed garlic, and cayenne pepper, two eggs in a gallon jug, shake well, fill rest of the way with water. Cap and let age a week. Then you drizzle small stream around the perimeter of whatever you want to keep them from eating. Works on rabbits, too
While we don't have deer, we do have rabbits. I was able to purchase deer spray that is really meant for deer, to use to prevent the rabbits from eating our flowers. This year, I only had a few flowers that interested the rabbits in pots. The rabbits only nibbled on a few so I let them eat. ;) Wishing you the best.
Hello. I personally understand this frustration.
Generally fencing and cautious plant choices before planting.
This was one of my exam questions.
Perhaps these references might help you.
Generally unless you want to construct tall fencing being aware of what deer like and dislike is advisable and to be aware of repellents effectiveness.
1-Preventive deterrent by plant/ landscaping choices could offer deer resistance
Landscape Plants Rated by Deer Resistance
https://njaes.rutgers.edu/pubs/download.php?strPubID=E271 This publication can offer homeowner comprehensive detailing that might aid in making the right choices before planting. Regional differences in deer species and plants could apply.
2-Deer a garden pest
3- Research has shown that, while that odor repellents tend not to work, taste repellents can be very effective. Any repellent with egg solids, blood, hot pepper, or capsaicin as an ingredient is your best choice. Some repellents contain both eggs and hot pepper or capsaicin, and those work particularly well.
Additional non edu sources include
Deer-Resistant Plants and Flowers: Keep Deer Out of Your Garden | The Old Farmer's Almanac
Deer Resistant Plant Lists by State
Deer Resistant Plants: 20 Deer Proof Shrubs, Flowers & Groundcovers | Garden Design