Once opened, Salad dressing (homemade) keeps about 2 weeks in the fridge.
That's the longest window published for Salad dressing (homemade) — opened in the fridge is its best case.
| Situation | Keeps for |
|---|---|
| Opened · fridge | 2 weeks |
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
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About 2 weeks refrigerated at 40°F (4°C) or below, according to USDA FoodKeeper v128. Refrigerate it once it's open.
Yes — keep Salad dressing (homemade) at 40°F (4°C) or below once it's open. Refrigerate at 40°F (4°C) or below.
Look for: Mould around the rim, cap, or surface; An off, fermented, or yeasty smell; Fizzing, bubbling, or a bulging lid; Separation or a colour change that won't stir back in. Those are the general signs for condiments & sauces — USDA FoodKeeper v128 publishes no spoilage note for Salad dressing (homemade) specifically. Never taste something to test it — when in doubt, throw it out.