> ## Content Index > Fetch the complete content index at: https://soapandsoil.com/llms.txt > Use this file to discover other available public pages before exploring further. # When to Bring Potted Plants Inside Before Frost - URL: https://soapandsoil.com/bring-potted-plants-inside/ - Published: 2026-10-11T15:15:40.000Z - Updated: 2026-10-11T15:15:40.000Z - Description: Tropical plants need to come in when nights reach about 50°F, well before the first frost. Check them for pests and let them adjust first, or the move does the damage. - Author: Soap & Soil - Tags: Garden, fall When to bring potted plants inside depends on the plant, but for anything tropical the answer is when nights fall to about 50°F (10°C). That is weeks before the first frost. Many houseplants that spent the summer outdoors are damaged in the mid-40s°F, and nearly all of them die at freezing. Start watching the forecast in late September. Check every pot for pests while it is still outside, and let each plant adjust for a few days before it comes in. ## Key takeaways - Tropical houseplants come in when night temperatures settle around 50°F (10°C), not when frost is forecast. - Tender garden plants such as pelargoniums and fuchsias are worth moving once it drops below 54 to 59°F (12 to 15°C). - Rinse the foliage outdoors, check the soil and the drainage holes, then keep the plant away from other houseplants for three to four weeks. - A few days on a sheltered porch, then a sunny window, prevents most of the leaf drop that follows a sudden move. - Hardy plants in pots stay outside. Their roots need protecting, not the plant. ## Why frost is the wrong signal Most plants people summer outdoors come from places that never get cold. A ficus, a peace lily or a tropical hibiscus does not need frost to suffer. [Iowa State's extension service](https://yardandgarden.extension.iastate.edu/faq/how-and-when-do-i-bring-my-houseplants-back-indoors-winter?ref=soapandsoil.com) puts the damage point for many indoor plants in the mid-to-lower 40s°F. [University of Minnesota Extension](https://extension.umn.edu/gardening-minnesota/bringing-houseplants-back-inside?ref=soapandsoil.com) gives 45 to 50°F, depending on the species. By the time a frost warning appears, a tropical plant has often had several damaging nights already. The damage is not always obvious at once. Leaves yellow or drop over the following week, which is easy to blame on the move indoors rather than on the cold that came before it. ## When to bring potted plants inside, by plant type Use the overnight low, not the daytime high. A sunny 65°F afternoon can follow a 44°F night. | Plant group | Examples | Bring in when nights reach | Where it winters | | --------------------------------------- | ---------------------------------------------- | ------------------------------- | --------------------------------------------------------------- | | Tropical houseplants summering outdoors | Ficus, peace lily, monstera, tropical hibiscus | About 50°F (10°C), consistently | Bright, indirect light in a heated room | | Tender garden plants | Pelargoniums (geraniums), fuchsias, begonias | 54 to 59°F (12 to 15°C) | A bright, warm room, 60 to 70°F (15 to 20°C) by day | | Citrus in pots | Lemon, orange, calamondin | Before the first frost | A cool, bright room around 50°F (10°C), watered sparingly | | Slightly tender plants | Salvias, cordyline, agave, echeveria | Before the first frost | Somewhere frost-free with light, at least 41 to 45°F (5 to 7°C) | | Hardy plants in pots | Lavender, thyme, hostas, most shrubs | They stay outside | Outdoors, with the pot wrapped and raised | The garden-plant figures come from the [Royal Horticultural Society's overwintering guidance](https://www.rhs.org.uk/prevention-protection/overwintering-in-conservatories?ref=soapandsoil.com). It notes that colder areas may need to start in September, while mild gardens can often wait until November. The forecast where you live decides, not the calendar. For hardy plants left outside, the risk is the pot. A container freezes from every side, so [wrap the pot and lift it onto feet](https://soapandsoil.com/prepare-garden-beds-winter/) rather than bringing the plant in. ## How to bring plants inside without the shock Start two to three weeks before the night you expect to need them in. That leaves time to deal with anything you find on them. It fits alongside [the rest of the fall checklist](https://soapandsoil.com/fall-home-maintenance-checklist/), and needs a dry afternoon, a hose, a bucket and a cleared windowsill. 1. **Pick a dry day and inspect every plant outdoors.** Look under the leaves, along the stems, on the soil surface and in the drainage holes. You are looking for aphids, spider mites, mealybugs, scale, whiteflies and fungus gnats. 2. **Rinse the foliage while the plant is still outside.** Spray the tops and undersides of the leaves with a hose on a gentle setting. Dunk pots small enough to lift in a bucket of water with a little mild dish soap. It reaches pests in the soil too. Rinse with clean water afterwards. 3. **Let it dry completely, and wash the outside of the pot.** Wet foliage in a warm room invites fungal problems. The pot rim and base often carry slugs and eggs. 4. **Give it a few days somewhere sheltered.** A porch, a carport or a spot against the house wall is slightly warmer and darker than the open garden. It eases the drop in light the plant is about to get. 5. **Start indoors in your sunniest window.** Minnesota Extension suggests a very sunny window first, then moving the plant to its winter position over the following weeks. 6. **Keep it apart from your other houseplants for three to four weeks.** Pests that survived the rinse usually show within a month. A separate room or windowsill keeps them from spreading. 7. **Check it at every watering.** Treat anything you find with an insecticidal soap, following the label, until it is gone. ## Mistakes that undo the move - **Waiting for a frost warning.** By then tropical plants have usually spent several nights below the temperature that harms them. - **Going straight from full sun to a dim corner.** The plant drops the leaves it cannot support in weak light. One that loses most of its leaves at once may not recover. - **Skipping the inspection.** One plant with spider mites can infest every houseplant in the room within weeks, and they spread faster in dry, heated air. - **Keeping the summer watering routine.** A plant in winter light uses far less water. Check the compost before watering, as in our guide to [how often to water houseplants](https://soapandsoil.com/how-often-water-houseplants/), rather than watering on a schedule. - **Feeding it through winter.** Iowa State advises stopping fertilizer in fall and winter. The plant is barely growing, so unused fertilizer builds up in the compost. ## What to expect in the first few weeks Some leaf drop is normal. Iowa State names tropical hibiscus and weeping fig as plants that shed leaves in lower light and grow new ones suited to it. Yellowing on a few older leaves is the plant adjusting. Yellowing everywhere, wilting or soft stems usually means cold damage from staying out too long, or compost kept too wet. If the light indoors is poor, a plant will stretch toward the window and grow pale. Turn the pot a quarter turn each week, or add a plant light on a timer. ## Frequently asked questions ### Can potted plants stay outside at 40 degrees? Tropical houseplants should not. Iowa State's extension service says many indoor plants are damaged once nights reach the mid-to-low 40s°F, well above freezing. Hardy plants such as lavender and thyme can stay out, but wrap their pots and lift them off the ground so the roots do not freeze solid. ### Why is my plant dropping leaves after I brought it inside? The light indoors is far weaker than outside, and the plant is shedding leaves it can no longer support. Tropical hibiscus and weeping fig are known for it. Keep it in bright, indirect light, water less, and new leaves suited to the lower light will grow back. ### How do I get rid of bugs before bringing plants inside? Rinse every leaf, top and underside, with water while the plant is still outdoors. Small pots can be dunked in a bucket of water with a little mild dish soap, then rinsed. Let the foliage dry, wash the outside of the pot, then keep the plant apart from your houseplants for three to four weeks. ### Can I keep geraniums inside over winter? Yes. Pelargoniums, the plants most people call geraniums, are tender and should come in before the first frost. The Royal Horticultural Society suggests moving tender plants once temperatures drop below 12 to 15°C (54 to 59°F), and keeping them somewhere bright with daytime warmth through winter.