☀️ Summer & heatwave
🌵 Heat-resistant plants
☀️ In short — essential actions during heatwaves
Keep your plants away from windows exposed to direct sun · Water early in the morning, never in full sun · Mist tropical foliage morning and evening · Do not fertilize during heat peaks · Air out at night when temperatures drop
Summers are becoming hotter and longer. Some plants get through heatwaves without flinching — others suffer from 30 °C. This guide helps you choose the most heat-resistant species, whether in an apartment, on a sunny balcony, or on a terrace.
Why some plants resist heat better
The most heat-resistant plants share common traits from their evolution in arid or subtropical areas: they store water (succulents, thick rhizomes), reduce transpiration with waxy or thick leaves, and can enter a semi-dormant state during heat peaks.
⚠️ The real danger: direct sun behind glass
In apartments, the main enemy is not ambient heat but direct sun behind a window. A south-facing glass can concentrate heat up to 60–70 °C in contact with the leaves. Move your plants 1–2 meters away from the window during heat waves — even resistant species can burn under these conditions.
The best heat-resistant indoor plants
These species tolerate overheated apartments in summer — high temperatures, dry air (air conditioning), and irregular watering during holidays.
The absolute champion of resistance. Its thick rhizomes store considerable water reserves — it can go weeks without watering and withstand temperatures above 38 °C without visible damage. Ideal for overheated apartments and long summer absences.
See the Zamioculcas →
Sansevieria tolerates heat and dry air with remarkable ease. Its CAM metabolism allows it to close its stomata during the day to limit evaporation — exactly the mechanism of plants from arid areas. It can go several weeks without watering in intense heat.
See the Sansevieria →
The Aloe vera is a succulent native to arid African regions — it is literally made for heat and drought. Its fleshy leaves store large amounts of water. It tolerates full sun and very high temperatures, provided it is not overwatered. Ideal on a sunny windowsill.
See the Aloe vera →
The Ficus Elastica tolerates warm apartments well thanks to its large waxy leaves that limit transpiration. During heatwaves, keep it away from direct sun behind the glass and water slightly more frequently. Avoid moving it during heatwaves — the stress of moving adds to heat stress.
See the Ficus Elastica →
The Yucca is native to the arid regions of Central America — it is perfectly adapted to heat and drought. Its woody trunk stores water reserves, allowing it to go weeks without watering even in intense heat. It enjoys good brightness but also tolerates partial shade.
See the Yucca →
The Euphorbia acrurensis looks like a large cactus but belongs to the euphorbia family — native to ultra-arid areas of Africa. It withstands extreme temperatures, intense sun, and months without watering. One of the most heat-resistant plants available. Place it in front of the sunniest window.
See the Cowboy Cactus →The best heat-resistant plants for outdoors
For balconies and terraces exposed to summer sun, you need plants capable of withstanding direct heat, intense solar radiation, and a substrate that dries very quickly.
The Strelitzia is native to South Africa — it is made for sun and heat. Outdoors in summer, it really thrives: its foliage grows larger, and it stores energy for autumn-winter flowering. Water generously — the substrate dries quickly in full sun. Bring it inside before cool nights below 10 °C.
See the Strelitzia →
The emblem of Mediterranean resilience. Potted Olivier loves intense heat, tolerates drought, and never suffers from direct sun — it’s its natural habitat. Its silvery evergreen foliage provides year-round presence. In summer, water every 2 to 3 days max — never excessively.
See the Olivier →
Star jasmine is one of the most heat-resistant climbers — its tough, evergreen leaves withstand intense summer sun. Once well established, it tolerates short droughts. During a heatwave, water deeply every 2 to 3 days and avoid watering in full sun.
See the Star Jasmine →
Lavender is perfectly suited to hot, dry summers — its Mediterranean origin gives it natural resistance to heat and drought. It blooms in June-July and perfumes the balcony for several weeks. Watering every 4 to 5 days is enough even in intense heat.
See the Lavender →
Fargesia is one of the toughest bamboos — it tolerates summer heat, wind, and even a few degrees of frost in winter. In a pot on a balcony, it needs regular watering in summer (daily in intense heat) because its substrate dries quickly. Excellent natural privacy screen.
See the Fargesia →
Sedum is a trailing succulent perfect for balcony planters and sunny windowsills. Its small fleshy leaves store water and withstand extreme heat and very infrequent watering. Elegant trailing from a planter or hanging pot.
See the Sedum →Quick comparison
| Plant | Location | Max tolerated temp. | Drought resistance | Watering during heatwave |
|---|---|---|---|---|
| Zamioculcas | Indoor | 40 °C+ | Excellent | 1×/month |
| Sansevieria | Indoor | 40 °C+ | Excellent | 1×/month |
| Aloe vera | In. / Out. | 45 °C+ | Excellent | 1×/2 weeks |
| Yucca | In. / Out. | 40 °C+ | Very good | 1×/2 weeks |
| Ficus Elastica | Indoor | 35 °C | Good | 1×/week |
| Cowboy Cactus | Indoor | 50 °C+ | Extreme | 1×/month |
| Strelitzia | In. / Out. | 40 °C | Good | 2×/week |
| Olivier | Outdoor | 45 °C+ | Excellent | 2–3×/week |
| Star Jasmine | Outdoor | 40 °C | Good | 2–3×/week |
| Lavender | Outdoor | 42 °C | Very good | Every 4–5 days |
| Fargesia | Outdoor | 35 °C | Low | Daily |
| Sedum | Out. / In. | 45 °C+ | Excellent | 1×/week |
The right actions during a heatwave
For all indoor plants
- Keep away from direct sun: move your plants 1–2 m from exposed windows — temperature behind glass can exceed 60 °C in summer full sun
- Water early in the morning: never in full sun or in the evening — cold water on hot leaves can cause thermal shock
- Mist the foliage of tropical plants (Monstera, Calathea, Philodendron) morning and evening to compensate for dry air
- Do not fertilize during heat peaks — stressed roots absorb nutrients poorly and can burn
- Air out at night to lower indoor temperature and refresh the air
- Do not repot during a heatwave — repotting stress adds to heat stress
For outdoor plants (balcony, terrace)
- Water deeply early in the morning — the substrate dries up to 3 times faster in full sun than in shade
- Use saucers filled with water for exposed pots — empty them outside heatwaves to avoid stagnation
- Group pots to create a more humid microclimate and reduce evaporation
- Protect the pots themselves from direct sun — a terracotta pot in full sun can exceed 50 °C and cook the roots
💡 Watering during holidays
Before leaving, water abundantly, group the plants, move them away from sunny windows, and close the shutters. For long absences (more than 2 weeks), prefer CAM metabolism plants (Sansevieria, Zamioculcas, Aloe vera) that can go longest without water. Check the monthly care calendar to adapt your care to each season.
Verdeia Collections
Heat-resistant plants
Selected for their summer robustness — indoors, balcony, or terrace.
Frequently asked questions
The most resilient: Zamioculcas, Sansevieria, Aloe vera, Yucca and Cowboy Cactus. These species of arid or subtropical origin store water and limit their transpiration in intense heat. They withstand temperatures from 38 to 45 °C without visible damage, provided they are protected from direct sun behind glass.
Essential actions: move plants 1–2 m away from exposed windows, water early in the morning, mist tropical foliage, ventilate at night, and avoid fertilizing or repotting. The main enemy is not ambient heat but direct sun behind a window that can reach 60–70 °C. Check the summer maintenance calendar for the right actions month by month.
The rule remains the same — water when the first centimeters of substrate are dry — but this threshold is reached faster in summer. Always use the finger test before watering. For outdoor plants in full sun, the substrate can dry in 24 to 48 hours and may require daily watering.
For a south-facing balcony: Star Jasmine, Olea europaea, Lavender, Strelitzia. These Mediterranean and subtropical plants love heat and intense sun. Water deeply every 2 to 3 days — the pot substrate in full sun dries out very quickly. Check our guide which plants for my balcony.
Tropical plants (Monstera, Philodendron, Calathea) tolerate mild heat (25–30 °C) well if the air humidity is sufficient. They suffer more from the combination of heat + dry air (air conditioning) than from heat alone. During heatwaves, mist their leaves morning and evening, keep them away from windows in full sun, and avoid direct air conditioning on the leaves.
Verdeia shop
Prepare your plants for summer
Each plant comes with its seasonal care sheet — summer watering, heat protection, care after heatwaves.
