How-to Guide
How to Keep Deer Out of the Garden
The short answer
The only dependable way to protect a garden from deer is a physical fence. White-tailed deer can jump up to 8 feet, so university Extension guidance recommends a fence at least 8 feet tall that runs all the way to the ground so deer cannot duck underneath. Deer normally will not jump a 6-foot fence, but when chased or threatened they can clear 8 feet on level ground, which is why 7-8 feet is the standard recommendation, especially where mule deer occur.
Repellents and 'deer-resistant' plants reduce damage but do not stop it. Repellents work best on low deer pressure and must be reapplied after rain and as plants grow; no plant is truly deer-proof when deer are hungry. If you already have a shorter fence, most existing fences can be made deer-resistant by extending them 3 to 4 feet upward with mesh or smooth wire.
Confirm deer are the culprit
Deer browsing leaves ragged, torn stem ends because deer lack upper front teeth, and damage typically occurs from ground level up to about head height on shrubs and small trees. Look for heart-shaped split-hoof tracks and pelleted droppings. Damage low to the ground with clean 45-degree cuts points to rabbits instead, and gnawed bark at the base of trunks points to rodents.
Fencing options that Extension sources support
- Full-height barrier: woven-wire or heavy polypropylene mesh fence about 8 feet tall, anchored tight to the ground so deer cannot push under.
- Upgrade an existing fence: add 3 to 4 feet of mesh or smooth wire above a standard yard fence to reach deer-resistant height.
- Invisible mesh barriers: 8-foot high-tensile polypropylene mesh blends into the landscape and is a common choice for home gardens.
- Electric fence: electrified poly-tape fences are used to train deer to avoid an area; follow the manufacturer's instructions and local rules for electric fencing.
- Small-area protection: individual netting cages or wire cylinders around young trees and prized plants are cheaper than fencing a whole yard.
✔ A fence only works if it is complete. Deer will find and use any gap, low spot, or open gate, so walk the line after storms and keep gates closed at dusk and dawn when deer feed.
What repellents can and cannot do
Extension sources group repellents into contact repellents (applied to the plant, taste-based) and area repellents (odor-based, applied near plants). Both types lose effectiveness in rain, on new growth, and wherever deer pressure is high; hungry deer in winter will feed on treated plants. Rotate products, reapply as labels direct, and treat repellents as a supplement to fencing rather than a substitute.
Deer-resistant planting as a strategy
Choosing plants deer prefer not to eat (strongly aromatic, fuzzy, or spiny plants) lowers the odds of damage in unfenced areas, but Extension guidance is consistent that resistance is relative: under enough hunger pressure deer sample almost anything. Use resistant plants for the outer, unprotected parts of the landscape and reserve fencing for vegetable gardens and high-value beds.
When to get outside help
If deer pressure is severe enough that fencing and repellents cannot keep up, contact your state wildlife agency or county Extension office. Options such as hunting or removal permits are regulated; check local wildlife regulations before considering any lethal control.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- Colorado State University Extension - Preventing Deer Damage — Deer normally will not jump a 6-foot fence but can clear an 8-foot fence when chased, so a 7- to 8-foot fence is recommended; repellents are contact or area types with limited duration.
- Iowa State University Extension - How to Protect Gardens from Deer — Fences must be at least 8 feet tall and extend to the ground; existing fences can be extended 3 to 4 feet with mesh or smooth wire.
- UC Statewide IPM Program - Deer — Fencing is the most reliable deer exclusion method; repellents and resistant plants provide only partial protection.