Yard, pool & pest chemicals
The shed shelf splits cleanly in two. Fertilizer, ice melt and weed killer concentrate barely age at all — what fails is the bag, the bottle or the germination rate. Pool chemicals are the other half, and there the question is not how weak they have gone but whether they have taken on water.
Updated
Hung fastest-first — the tags at the top go off soonest
- Chlorine tabletsSealed1–5 yearsSafety issue
- Pool shockSealed1–5 yearsSafety issue
- Grass seedSealed2–3 yearsDegraded performance
- Mouse baitSealed2–3 yearsDegraded performance
- Pesticide concentrateSealed2–3 years or moreDegraded performance
- Pool test stripsSealed2–3 yearsDegraded performance
- Wasp spraySealed2–3 years or moreDegraded performance
- Liquid fertilizerSealed3–4 years or moreDegraded performance
- Weed killer (glyphosate)Sealed4–8 yearsDegraded performance
- AlgaecideSealedUp to 5 yearsDegraded performance
- Granular fertilizerSealedDoesn't meaningfully expireHarmless
- Ice meltSealedDoesn't meaningfully expireHarmless
- Insect repellentSealedDoesn't meaningfully expireDegraded performance
- Muriatic acidSealedDoesn't meaningfully expireSafety issue