Hanging backyard string lights takes four moves: measure the run, mark your anchors, install the hardware, then attach the lights with slack so the cord never bears the load.
One strung-too-tight cord snaps a wire or yanks a hook out of soft wood by August. The work that prevents that happens before a single bulb goes up — measuring the span, picking structures that won’t flex, and leaving a little droop in every section. A typical yard run takes an afternoon, and most of it is deciding where the lights attach.
Here’s how to hang string lights in a backyard, in the order that keeps you off the ladder twice.
Plan The Run And Anchor Points First
String lights perform best when every attachment point is a solid structure and no single span stretches past about 10 to 12 feet without extra support. Mark those points on paper before you touch a drill.
Walk the yard in daylight and map the route. Lowe’s recommends running a wire or cable between anchors and attaching the lights to that support line, which takes the tension off the light cord itself. For short spans between sturdy posts, hanging the lights directly on hooks works fine.
Good anchor candidates:
- Wooden fence posts and fence rails
- Soffits, pergolas, and porch beams
- Tree trunks thick enough to hold a screw eye
- Dedicated metal or wooden poles set for the purpose
Skip any beam that already carries a fixture or ceiling fan — Home Depot’s guide flags those as poor mounting spots. Then measure each span and add up the total run so you buy enough strand the first time. If you’re still choosing a set, a tested roundup of backyard string lights saves a second trip to the store.
Install The Hardware Without Splitting The Wood
Drill a starter hole slightly narrower than your hook or eye bolt, then twist the hardware in by hand. The pilot hole is what stops a fence post or soffit from splitting.
Lowe’s suggests drilling starter holes before screwing eye bolts into soffits or trees. Home Depot’s instructions say the same for trees, and add that you should lay out the cords first and mark where mounting support is needed before installing anything.
What you use depends on the surface:
- Eye bolts or screw eyes — the strongest option; thread a support wire through them for long runs.
- Cup hooks — fast for light strands and short spans, but they pull out of soft wood under load.
- Tree straps — wrap the trunk instead of driving metal into living bark, which is kinder to the tree and holds well.
- Suspension wire or cable guides — for spans over roughly 12 feet, or any anchor that has some give.
Avoid beams with existing fixtures or fans when you hang lights on a patio, per Home Depot. Then thread the strand through the hooks, leaving a slight droop between each one rather than pulling it guitar-string tight.
Wire The Power Safely
Outdoor lights need an outdoor-rated extension cord and a GFCI-protected outlet. String more strands than the manufacturer’s coupling limit allows and you risk an overloaded circuit.
Leave a small amount of slack near the power source instead of yanking the cord tight — that loop of give keeps strain off the plug connection. If you fasten the cord down with staples, keep them out of the wire path. Home Depot warns plainly against stapling through wiring.
Two habits matter most when you’re working overhead: use a helper to steady the ladder, and plug the strand in to test it before you commit to the final positions.
| Anchor Type | Best For | Watch Out For |
|---|---|---|
| Screw eye or eye bolt | Fences, soffits, pergolas | Needs a pilot hole to avoid splitting |
| Cup hook | Short spans, light strands | Pulls out of soft wood under weight |
| Tree strap | Trunks and branches | Loosen it slightly as the tree grows |
| Support wire or cable | Long runs, flexible anchors | Reduces sag but adds setup time |
| Dedicated post | Open yards with no structures | Set it deep enough to resist wind load |
Test Before You Finalize
Plug the full run in and check every bulb while the strand still has slack to spare. A dead section is far easier to swap now than after you’ve tightened and trimmed the line.
Lay the cords out, mark the mounting points, install the hooks or suspension kit Home Depot describes, and only then commit to the run. Once it lights cleanly, tuck the slack near the outlet, and you’re done. If you’re hanging strand after strand on the same fence, the run that sags least is the one where the hooks sit level with each other — eyeball that line before drilling the first hole, not after.
FAQs
Do I need a support wire for backyard string lights?
Not always. Spans under about 10 feet between sturdy posts usually hold fine on hooks alone. Add a tensioned support wire when your spans run longer, when the anchors have some flex, or when the strand keeps sagging. Lowe’s recommends running wire between anchors and attaching the lights to that line, which keeps tension off the cord.
How do I keep string lights from sagging in the middle?
Add an anchor point between the two ends. A wire or cable strung between anchors carries the weight and stops the dip. Leave a slight droop rather than pulling tight, since a cord under constant tension strains both the wire and the hardware holding it.
Can I hang string lights in a tree?
Yes, with care. Drill a guide hole before driving a screw eye, or use a strap around the trunk so you don’t puncture the bark. Home Depot’s guide notes drilling guide holes in trees. Avoid wrapping the trunk tightly, and check the strap as the tree grows.
How many strands can I connect together?
Follow the manufacturer’s maximum coupling limit printed on the packaging or the cord tag. Exceeding it risks an overloaded circuit. Plug the run into a GFCI-protected outdoor outlet, use an outdoor-rated extension cord, and leave slack near the plug so the connection isn’t pulled tight.
References & Sources
- Lowe’s. “How to Hang Outdoor String Lights: Backyards and Patios.” Supports drilling starter holes, eye bolts in soffits and trees, and supporting long runs with a wire between anchors.
- Home Depot. “How to Hang Outdoor String Lights.” Supports measuring the run, drilling guide holes, laying out cords before mounting, and avoiding staples through wiring.
- Wirecutter (The New York Times). “How to Hang Outdoor String Lights.” General guidance on hardware, slack, and safe installation practice.
