Summer houseplant care means managing light, temperature, watering, feeding, pests, and leaf cleaning. Here's how to help plants thrive.
Summer changes everything—even for plants growing indoors.
While your houseplants may seem protected from the seasons, they're actually experiencing many of the same environmental changes happening outside your window. Longer days, stronger sunlight, warmer temperatures, and shifting humidity levels all influence how your plants grow.
That's why a houseplant that looked perfectly happy in spring may suddenly need a little extra attention in summer.
Here's what to watch for.
Does Summer Sunlight Affect Indoor Plants?
Absolutely.
During summer, days are longer and sunlight is more intense. That means the bright spot where your plant thrived all winter and spring could suddenly become too intense.
Watch for:
- Brown patches on leaves
- Bleached or faded foliage
- Crispy leaf edges
These can be signs that your plant is getting more direct sun than it prefers. At the same time, some homes actually become darker during summer. Trees fill out with leaves, blocking sunlight that previously reached indoor spaces. If a once-bright location now feels dim, your plant may benefit from moving closer to a window.
Quick Tip
Take a fresh look at your plant placement every season. The best spot in March might not be the best spot in July.
Do Houseplants Need More Water in Summer?
Often, yes—but not always.
Many houseplants actively grow during the warmer months. As they produce new leaves and stems, they typically use more water than they do during cooler seasons.
Instead of watering on a fixed schedule, check soil moisture first.
A plant sitting in a sunny room may dry much faster than the same plant growing in a cooler or shadier area of your home.
Quick Tip
Stick your finger about an inch into the potting mix. If it feels dry, it's probably time to water.
Summer Care Made Simpler
If keeping up with summer watering feels like a challenge—especially during travel season—a self-watering planter can take some of the guesswork out of the routine.
We offer select houseplants in 4.8-, 6- and 10-inch self-watering planters, designed to provide a steady supply of moisture between waterings. A built-in reservoir helps deliver water to the roots as the plant needs it, so hydration stays more consistent through the hottest, fastest-growing weeks of the year—and there's a little less pressure on you to get the timing exactly right.
Learn how the Twist.Lift.Water.™ system works.
Learn how the 10-inch self-watering pot works.
Quick Tip
The 10-inch reservoir holds up to 5 cups; when the level window reads low, add 1–2 cups and let it work down into the reservoir. Always check the window before refilling so you don't overfill.
Can Air Conditioning Stress Houseplants?
It can.
We often think about winter drafts, but summer air conditioning can create challenges, too.
Cool air blowing directly onto foliage may cause stress over time. Some plants may react with brown leaf tips, slowed growth, or leaf drop.
Keep plants away from:
- Air conditioning vents
- Frequently opened exterior doors
- Areas with constant blasts of cold air
Most common houseplants are happiest between 65 and 80°F—roughly the same range people find comfortable—so keep them out of the direct path of AC vents.
Quick Tip
If you'd be uncomfortable sitting in the airflow, your plant probably isn't enjoying it either.
Should You Fertilize Houseplants in Summer?
Summer's longer days and warmer temperatures make it peak growing season for many houseplants—and a great time to feed them.
When plants are actively producing new growth, they can benefit from the nutrients provided by a balanced houseplant fertilizer.
Always follow label directions. More fertilizer doesn't create a healthier plant—and too much can damage roots.
Quick Tip
Think of fertilizer as a supplement, not a substitute for proper light and watering.
Should You Repot Houseplants in Summer?
Summer is a good time to repot many houseplants. Longer days and warmer temperatures encourage active growth, helping plants adjust after being moved into fresh potting mix.
But don’t repot simply because it’s summer. Consider repotting if:
- The plant has been growing in the same potting mix for about two years
- Roots are crowding or beginning to block the drainage holes
- The plant is becoming top-heavy, or water runs straight through the potting mix
If the potting mix needs refreshing but the roots aren’t crowded, you can return the plant to the same pot with fresh mix. If the plant needs more room, choose a container no more than 2 inches wider and deeper than the current one. A much larger pot can hold excess moisture around the roots and increase the risk of root rot.
Click here for a helpful repotting video.
Click here for a step-by-step blog with photos about repotting.
Quick Tip
Always choose a container with good drainage—and don’t assume a bigger pot is automatically better.
Why Are Pests More Common in Summer?
Warm weather encourages activity—not just from plants, but from pests as well.
If you move plants outdoors for the season or frequently open doors and windows, insects can sometimes find their way to your collection.
Watch for:
Early detection makes treatment much easier.
Quick Tip
Check undersides oof leaves on watering day. That's where many pests like to hide.
Should You Clean Houseplant Leaves in Summer?
More than you might think.
Here are the things to consider in caring for your indoor plants in summer.
Leaves are how your plant captures light and turns it into energy. When dust, dirt, and pollen build up on the surface, they can block light and make it harder for your plant to photosynthesize efficiently—right when summer's longer days should be fueling its best growth.
Summer also tends to bring more open windows, more airflow, and more outdoor pollen indoors, so leaves can get dusty faster this time of year.
To keep them clean:
- Gently wipe leaves with a soft, damp cloth
- Support the underside of each leaf as you wipe
- For plants with many small leaves, a quick rinse in the shower or sink works well
Quick Tip
Wipe leaves every couple of weeks during summer to keep them dust-free and photosynthesizing at full strength.
What if You're Travelling This Summer?
Vacation season can be stressful for plant parents.
The good news? Most houseplants are tougher than we think.
Before leaving:
- Water plants if needed
- Move thirsty plants slightly farther from bright windows
- Avoid fertilizing immediately before a trip
- Ask a friend for help only if you'll be gone for an extended period
Plants growing in self-watering planters may be especially helpful during summer travel, helping maintain consistent moisture while you're away.
Quick Tip
A healthy plant is more likely to recover from a missed watering than from root rot caused by overwatering before a trip.
Don't Forget to Enjoy the Growth
With more light and warmth, summer is when many houseplants truly shine.
You may notice larger leaves, faster growth, brighter color, or entirely new stems emerging. These are signs that your plant is actively responding to the season.
A few small adjustments can help your houseplants make the most of summer—and reward you with their best growth of the year.
Summer Houseplant Checkup
Take two minutes to ask:
☐ Is this plant receiving the right amount of light?
☐ Has its watering routine changed?
☐ Is it sitting near an air conditioning vent?
☐ Do I see active new growth?
☐ Does it need fertilizer?
☐ Are the leaves clean?
☐ Have I checked for pests recently?
If you can check off most of these boxes, your houseplants are likely set up for a successful summer.
Summer Houseplant Care FAQs
How often should I water indoor plants during summer?
There isn't one schedule that works for every plant. Increased daylight, warmer temperatures, and active growth often mean houseplants use water more quickly in summer. Check soil moisture regularly and water based on the plant's needs rather than the calendar.
Can summer sun burn houseplant leaves?
Yes. Some houseplants can develop brown patches, faded areas, or crispy leaf edges when exposed to too much direct sunlight. If you notice signs of sun stress, move the plant slightly farther from the window or filter the light with a sheer curtain.
Is air conditioning bad for houseplants?
Houseplants generally tolerate air-conditioned homes well, but they may struggle when cool air blows directly onto the foliage. Keep plants away from vents and areas with constant drafts.
Are self-watering planters good for houseplants?
Self-watering planters can help provide more consistent moisture and are especially useful for busy plant parents or summer travelers. Costa Farms offers select houseplants in both 6-inch and 10-inch self-watering planters for plant parents looking for a more convenient watering experience.
Should I repot houseplants in summer?
The active growth spurred by summer's warmth makes it a good time. If a plant has been in the same potting mix for about two years, refresh it—and when sizing up, choose a pot no more than 2 inches wider than the current one. Click here for a helpful repotting video.
