The Houseplant Vacation: How to Move Your Plants Outside for Summer

If you've been staring at your living-room jungle wondering whether they'd be happier outside this summer — the answer for most of them is yes, and now is the moment.

Mid-May to early June is the sweet spot in most of the US: nights are reliably above 50°F, the sun is strong but not yet brutal, and plants are in full growing mode. Move them out the right way and you'll see a season of growth that no indoor windowsill can match. Move them out the wrong way and you'll spend July nursing leaf burn, spider mites, and a sad pile of crispy stems.

Here's how we do it.

What does "hardening off" actually mean?

Hardening off is the gradual process of letting an indoor plant adjust to the wind, intense sunlight, and temperature swings of life outside. Indoor plants spend their whole lives in a stable, low-light, draft-free environment. Throwing them straight onto a sunny patio is the botanical equivalent of taking someone who works in a basement office and dropping them into a beach vacation in Cancun. They will burn.

The good news: hardening off only takes about a week, and once it's done, your plant is set for the entire summer.

The seven-day hardening-off schedule

Pick a stretch of mild weather — no storms forecast, no heat waves, no dips below 50°F at night. Then:

• Day 1: Two hours outside in full shade. North-facing porch, under a tree, anywhere with no direct sun. Bring it back in before the temperature drops.
• Day 2: Four hours in shade.
• Day 3: Six hours in shade.
• Day 4: All day in shade. If nights are forecast above 55°F, you can start leaving it out overnight.
• Day 5: Move to dappled shade or one hour of morning sun, then back to shade for the rest of the day.
• Day 6: Two to three hours of morning sun, then shade.
• Day 7: Move to its summer spot. For most houseplants, that's bright shade with a couple of hours of morning sun. Direct afternoon sun is too much for almost every common houseplant.

If you skip a day or get a weather curveball, just resume from where you left off. There's no penalty for going slow.

Which plants love a summer outside?

Almost all of these will thrive outdoors from late May through early September:

• Monsteras, philodendrons, pothos — they explode with new leaves outside
• Hoyas — outdoor humidity and UV often triggers blooms you'll never get indoors
• Tropical figs (Ficus lyrata, Ficus elastica, Ficus Audrey) — love the airflow
• Bird of paradise — finally gets the light it actually needs
• Citrus and olive trees — outdoor sun is non-negotiable for fruit
• Most succulents and cacti — but ease them into direct sun extra slowly; they sunburn fast despite their reputation
• Bromeliads, anthuriums, alocasias — bright shade only, no direct sun

Which plants should stay inside?

• Calatheas, marantas, stromanthes — they hate wind, direct sun, and any temperature swing. Leave them on their stable indoor shelf.
• African violets — too delicate; one rain shower will destroy them.
• Maidenhair ferns — they want the bathroom, not the patio.
• Anything with thin, paper-like leaves and high humidity needs — outdoor air is drier than your indoor air, and the leaves will crisp.

How often should I water plants that are outside?

More often than indoors. Wind and direct light dry pots out fast — a plant you watered every two weeks indoors might need water twice a week on a sunny patio. Check the top inch of soil daily for the first couple of weeks until you learn the new rhythm. Plants in terracotta pots dry out fastest; plastic and glazed ceramic stay moist longer.

One trick: water in the morning, not the evening. Wet leaves overnight invite fungal problems, and morning watering gives the plant a full day to drink.

The mistakes we see every spring

• Putting plants directly into full sun on day one. Even sun-loving plants need to be hardened off — their indoor leaves are not adapted. Sunburn looks like bleached white or brown patches, and those leaves don't recover.
• Forgetting about wind. A monstera that's never felt a breeze can lose half its leaves to a single gusty afternoon. Stake it for the first week or place it somewhere sheltered.
• Underestimating overnight temperature drops. A 70°F day can become a 48°F night, especially in early May. Tropicals start sulking below 55°F and may drop leaves below 50°F.
• Skipping the saucer check. Outdoor pots collect rainwater fast. Saucers that sit full of water rot roots. Either dump them after every rain or skip the saucer outdoors.
• Bringing pests indoors in September without quarantine. We'll cover the autumn return in a future guide, but tag this one mentally — your plants will pick up hitchhikers outside.

When to bring them back inside

Reverse the process when nights consistently dip below 55°F. In most of the US that's mid-September; in the Pacific Northwest and Northeast, late August. Inspect every plant for pests before it crosses the threshold — outdoor plants almost always come home with spider mites or scale, and one infested plant can spread to your whole collection.

Hose every plant down (top and bottom of leaves), let them dry, and quarantine them in a separate room for two weeks if you can.

One last thing

The hardest part of moving plants outside isn't the plants — it's overcoming the fear. We've all watched a plant we love go from glossy and happy on the windowsill to crispy on the patio in three days. Going slow is the difference. A plant that gets a real summer vacation comes back in September almost unrecognizable.

Snap a "before" photo this week. We promise the September side-by-side will surprise you.

🌿 Got plants you're moving out this weekend? Post photos in the forum — we love seeing the lineups.