Plants To Bring Indoors To Overwinter – Your Essential Guide

ByEric James Updated on

As the leaves begin to turn and the crisp air signals the coming chill, many outdoor enthusiasts face a familiar dilemma. Those vibrant, beloved plants that graced your patio, deck, or garden all summer now face a harsh reality: winter. For campers, vanlifers, and homesteaders alike, the thought of leaving behind tender perennials or tropical favorites can be disheartening. But what if you could extend their life, even bring them inside to thrive until spring? This guide is your roadmap to successfully bringing plants indoors to overwinter, ensuring your green companions survive the cold and are ready to shine again next season.

We understand the desire to keep that splash of color and life around, even when the mercury drops. It’s about more than just saving a plant; it’s about nurturing a connection to nature that extends beyond the warmer months. This article will walk you through everything you need to know, from selecting the right candidates to creating the perfect indoor environment.

Why Bring Plants Indoors for the Winter?

The decision to bring plants indoors is often driven by their inability to withstand freezing temperatures. Many popular garden additions, like geraniums, coleus, and citrus trees, are tropical or subtropical in origin. They simply aren’t built for frost or prolonged cold.

Bringing these plants inside is a proactive way to protect your investment and your gardening joy. It’s also a fantastic way to enjoy greenery inside your home, RV, or campervan during the often-barren winter months. For those living off-grid or in mobile homes, this practice can bring a touch of the outdoors in, enhancing your living space.

Selecting the Right Plants to Bring Indoors to Overwinter

Not every plant is a good candidate for indoor overwintering. Success hinges on choosing wisely. Look for plants that are:

  • Tropicals and tender perennials: These are your primary candidates. Think hibiscus, lantana, fuchsias, and salvias.
  • Herbs: Many culinary herbs, like basil, rosemary, and thyme, can be successfully overwintered indoors.
  • Container plants: Plants that are already in pots are naturally easier to move.
  • Plants with sentimental value: If a plant holds special meaning, it’s often worth the effort.

Avoid plants that are naturally hardy perennials meant to die back and regrow from their roots, or those that require a specific chilling period to bloom. Research your specific plant varieties to understand their winter needs.

Preparing Your Plants for the Transition

This is a crucial step. A sudden move indoors can shock your plants if not done correctly. Preparation should begin a few weeks before the first expected frost.

Inspect for Pests

This is perhaps the most important step. Outdoor plants are often hosts to various insects. Bringing them inside without a thorough check can lead to a full-blown infestation in your home or living space.

  • Examine leaves: Look closely at the undersides of leaves, stems, and in the soil for aphids, spider mites, whiteflies, mealybugs, and scale.
  • Treat if necessary: If you find pests, treat the plant with insecticidal soap or neem oil. You might need to repeat treatments. Isolate any infested plants until they are pest-free.
  • Rinse leaves: A good rinse with your garden hose (or a strong spray from your sink faucet if potted) can dislodge many common pests and dust.
See also January Birth Flowers – Embrace Nature'S Winter Resilience And Meaning

Prune and Trim

Pruning helps manage the plant’s size for indoor conditions and encourages bushier growth.

  • Reduce size: Trim back leggy stems by about one-third to one-half. This will make them more manageable indoors and encourage new growth.
  • Remove dead or damaged parts: Clean up any yellowing leaves or broken stems.
  • Shape the plant: Use clean pruning shears or bypass pruners for a clean cut.

Gradually Acclimate to Indoor Conditions

Don’t move plants directly from a sunny, outdoor environment to a dark, indoor one. This can cause leaf drop.

  • Partial shade: Start by moving plants to a shadier spot outdoors for a week or two.
  • Reduced watering: As they acclimate, slightly reduce watering.
  • Bring inside at night: For about a week before the final move, bring plants inside during the evening and place them back outside in the morning. This gradual adjustment softens the shock.

The Best Plants to Bring Indoors to Overwinter

When considering what plants to bring indoors to overwinter, think about those that offer a beautiful display, a useful purpose, or a touch of the exotic.

Geraniums (Pelargoniums)

These classic patio plants are relatively easy to overwinter. They don’t need to be in peak flowering form.

  • Method: You can either pot them up as you would normally, or you can store them bare-root. For bare-root storage, clean off excess soil, prune them back significantly (leaving about 6-8 inches of stem), and hang them upside down in a cool, dark, dry place like a basement or garage. Mist them occasionally to prevent them from drying out completely.
  • Light needs: When brought back into light in late winter, they will need a sunny window.

Citrus Trees (Dwarf Varieties)

Dwarf citrus trees like Meyer lemons or calamondins can be stunning additions to an indoor collection.

  • Potting: Ensure they are in well-draining pots. Use a good quality potting mix.
  • Light: They require the brightest possible light, ideally a south-facing window. A grow light is often necessary for them to produce fruit indoors.
  • Humidity: Citrus trees appreciate higher humidity. Placing the pot on a pebble tray filled with water can help.

Tropical Hibiscus

These vibrant bloomers can be a challenge but are rewarding if you succeed.

  • Pruning: Prune them back hard, leaving only a few main stems.
  • Pest watch: Hibiscus are notorious for attracting spider mites and whiteflies. Vigilance is key.
  • Light and water: They need bright light and consistent moisture. Avoid letting them dry out completely.

Coleus

Known for their stunning foliage, coleus are easy to propagate and grow.

  • Ease of care: Coleus are very forgiving. They can be grown from cuttings or by potting up the entire plant.
  • Light: They prefer bright, indirect light indoors.
  • Watering: Keep the soil consistently moist but not waterlogged.

Fuchsias

These delicate, trailing plants can add a touch of elegance indoors.

  • Dormancy option: Fuchsias can also be put into a dormant state. Prune them back hard, remove most leaves, and store them in a cool, dark place with minimal watering.
  • Active growth: If kept actively growing, they will need bright, indirect light and consistent moisture.
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Basil and Other Tender Herbs

Basil is a prime example of a plant that thrives outdoors in summer but succumbs to frost.

  • Potting: Pot up healthy basil plants, ensuring they have good drainage.
  • Light: Basil needs a lot of light to thrive indoors. A sunny windowsill or a grow light is essential.
  • Watering: Keep the soil moist. Harvest leaves regularly to encourage bushier growth. Other herbs like rosemary and thyme can also be brought in, though rosemary may require a cooler, brighter spot.

Creating the Ideal Indoor Environment

Once your plants are inside, the challenge shifts to replicating their preferred outdoor conditions as closely as possible.

Light Requirements

This is often the biggest hurdle. Indoor light levels are significantly lower than outdoor sunlight.

  • South-facing windows: These offer the most light.
  • Grow lights: For many plants, especially those that flower or fruit, supplemental lighting is non-negotiable. LED grow lights are energy-efficient and effective. Position them according to manufacturer instructions.
  • Rotation: Rotate plants regularly so all sides receive adequate light.

Watering and Humidity

Indoor air is often dry, especially with heating systems running.

  • Watering: Water thoroughly when the top inch of soil feels dry. Avoid overwatering, which can lead to root rot. Use room-temperature water.
  • Humidity: Most houseplants benefit from higher humidity.
    • Pebble trays: Place pots on trays filled with pebbles and water. Ensure the pot isn’t sitting directly in the water.
    • Misting: Misting can provide a temporary boost, but it’s not a long-term solution for significant humidity needs.
    • Humidifiers: For a collection of plants or very sensitive species, a room humidifier is the most effective solution.

Temperature and Air Circulation

Most houseplants prefer temperatures similar to what humans find comfortable.

  • Avoid drafts: Keep plants away from cold drafts from windows or doors, and also from direct heat sources like radiators or heating vents.
  • Air circulation: Good air movement helps prevent fungal diseases. A small fan on a low setting can be beneficial.

Fertilizing

Plants indoors generally require much less fertilizer than when they are actively growing outdoors.

  • Reduce frequency: Fertilize sparingly, if at all, during the winter months. Most plants enter a period of semi-dormancy.
  • Dilute: If you do fertilize, use a diluted solution, perhaps half-strength, and only when the plant shows signs of active growth.

Troubleshooting Common Indoor Overwintering Issues

Even with the best preparations, you might encounter problems.

Yellowing Leaves

This can be caused by several factors:

  • Overwatering: The most common culprit. Ensure soil is drying out between waterings.
  • Underwatering: If the soil is consistently dry, the plant might be thirsty.
  • Lack of light: Insufficient light can cause lower leaves to yellow and drop.
  • Transplant shock: Some leaf drop is normal after the initial move.

Pests Reappearing

Despite initial checks, pests can sometimes emerge indoors.

  • Isolation: Immediately isolate any plant showing signs of pests.
  • Treatment: Re-treat with insecticidal soap or neem oil.
  • Cleanliness: Keep the area around your plants clean.

Leggy Growth

This indicates the plant is not getting enough light.

  • Move to brighter location: Find a sunnier spot or increase grow light duration.
  • Prune: Pruning leggy stems will encourage bushier growth once light conditions improve.

Transitioning Back Outdoors in Spring

As the days lengthen and the threat of frost recedes, it’s time to prepare your plants for their return to the outdoors.

Gradual Acclimation (Reverse Process)

Just as you acclimated them indoors, now you must acclimate them back to outdoor conditions.

  • Start in shade: Begin by placing plants in a sheltered, shady spot outdoors.
  • Increase sun exposure: Gradually move them into brighter light over a week or two.
  • Watch for sunburn: Direct, intense sun can scorch leaves that have become accustomed to lower indoor light.

Refresh Soil and Fertilize

  • Repotting: Consider repotting plants that have outgrown their containers.
  • Fresh soil: Use fresh potting mix.
  • Fertilize: Once they are settled outdoors and showing new growth, you can begin a regular fertilizing schedule.

Frequently Asked Questions About Plants to Bring Indoors to Overwinter

How do I know when to bring my plants inside?

The best time to bring plants indoors is typically before the first frost. Watch your local weather forecasts and aim to bring them in when nighttime temperatures consistently drop below 50°F (10°C), especially for tender tropicals.

Can I just dig up my plants from the garden and bring them in?

For many plants, yes, but it’s best to pot them up into containers with fresh potting soil. This gives you more control over watering, drainage, and pest management. Digging them up with a good amount of soil around the roots is crucial.

Will my plants flower indoors?

Some plants, like geraniums and fuchsias, may produce a few flowers indoors, especially if they receive ample light. However, many plants will focus on survival and vegetative growth during winter and may not flower prolifically until they return outdoors.

How much light do houseplants really need?

This varies greatly by plant species. Generally, most plants that thrive outdoors in full sun will need the brightest possible light indoors, often requiring supplemental grow lights. Plants that prefer partial shade outdoors will do well in bright, indirect light.

What if I don’t have enough space for all my plants?

Consider overwintering them in a less conventional way. Dormancy is an option for some plants (like geraniums or fuchsias) where you can store them in a cool, dark, and relatively dry location, drastically reducing watering needs. Another option is to take cuttings and root them indoors, starting new plants from your favorites.

Embrace the Green Indoors

Bringing plants indoors to overwinter is a rewarding practice that allows you to preserve your garden favorites, enjoy living greenery year-round, and enhance your living space, whether you’re parked in a cozy campervan or tending your homestead. With careful preparation, a keen eye for detail, and a little patience, you can ensure your tender plants not only survive the winter but emerge healthier and more vibrant than ever come spring.

Stay safe, stay comfortable, and happy gardening, no matter the season!

Eric James
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