A balcony is lovely in the summer, but precisely when it's hot, your plants struggle. In containers and pots, the soil dries out much faster than in open ground, and during a heatwave or a week's vacation, things can go wrong. With a few smart habits and the right materials, you can effortlessly keep your balcony plants healthy, even when you're not around. In this guide, you'll learn how to water balcony plants during heat and vacation.
Why watering on a balcony requires extra attention
Potted plants have a limited amount of soil and thus a limited water supply. On a warm, sunny, or windy balcony, that moisture evaporates rapidly—due to the sun from above and the heat reflected by walls and floors. Small pots can sometimes dry out twice a day as a result. The larger the container and the more soil, the more stable the moisture content remains.
Watering during a heatwave
At the right time
Water early in the morning—this allows the plant to drink before the greatest heat, and less water evaporates. If that's not possible, choose the evening. Never water in the full midday sun: most of it will evaporate, and wet drops on leaves can cause scorching in bright light.
Thoroughly instead of frequently
It's better to water thoroughly once, so the entire root ball is soaked, than to give a small splash each time. This encourages roots to grow deeper, making your plant less susceptible to drought. Water running out the bottom of the container means the soil is truly saturated.
Inhibiting evaporation
A layer of mulch—wood chips, gravel, or even coir—on top of the soil retains moisture longer and keeps the roots cooler. Move sensitive plants out of direct sunlight during the hottest hours.
On vacation: how your plants survive
Choose a container with a water reservoir
The simplest solution is a planter with a built-in water reservoir, like the Vercony GreenUp. The plant drinks from the supply at the bottom as needed, and that supply can last days to over a week, depending on the weather and the plant. Ideal when you're away.
DIY watering
No reservoir? There are plenty of tricks:
- Wick system: a cotton string from a bucket of water to the pot slowly wicks moisture.
- Inverted bottle or drip spike: gradually releases water to the soil.
- Water bath: place pots in a shallow layer of water for a short time so they soak up water from below.
Grouping and shading
Before you leave, place your pots close together and as much out of direct sunlight as possible. Together, they keep the air around them moister and protect each other. A good neighbor who comes by once to water works wonders, of course.
In short
In the heat, water thoroughly in the morning, cover the soil to prevent evaporation, and choose a spacious container—preferably with a water reservoir. If you're going away, combine a reservoir or a self-watering trick with pots placed close together in the shade. That way, your balcony will still look fresh when you return home.
Frequently asked questions
How long can balcony plants go without water during vacation?
In a regular pot, often only 1–3 hot days. With a planter with a water reservoir or a self-watering system, you can extend that to a week or more, depending on the weather and the plant.
When is the best time to water balcony plants in summer?
Early morning is ideal: the plant drinks before the heat, and little evaporates. The evening is a good alternative. Avoid the full midday sun.
How do I know if my balcony plant has enough water?
Stick your finger a few centimeters into the soil. If it feels dry, it's time. If it still feels moist, wait. Water running out the bottom of the container means the root ball is saturated.
Can a plant also get too much water?
Yes. Standing water combined with heat causes roots to rot. Always ensure good drainage and permeable potting soil, so excess water can escape.
