ᐅ Experience with using Kallax as a windowsill for plants in a conservatory or sunroom?

Created on: 22 Sep 2020 08:17
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revin49
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revin49
22 Sep 2020 08:17
Hello everyone,
I am currently considering using IKEA’s Kallax shelves as a windowsill solution for my plants in my conservatory. My main question is: How durable and stable are these shelves under constant load from plant pots, some of which contain heavier soil and water?

I am also interested in how suitable the Kallax units are for plants due to their size and structure—that is, whether there is enough space for containers and how the air circulation underneath and around them works.

Another point is the surface: How easy is it to clean if soil or water spills?

Has anyone had experience using Kallax as a windowsill in a conservatory and can share insights regarding maintenance, stability, and suitability?

Looking forward to your feedback!
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FAZAR
22 Sep 2020 09:45
Hello revin49,

I can provide some detailed insights regarding your question about the Kallax shelves in the conservatory, as I have been using similar setups for years. Basically, the Kallax units are quite sturdy – they are made of wood-based panels designed for moderate loads. I have consistently placed up to 10 kilograms (22 lbs) per compartment with potted plants without any issues. However, it depends on how you set up the units: it’s best to place them on a reasonably level surface and ideally secure them together to increase stability.

Regarding the size: the compartments are about 33 cm (13 inches) high, wide, and deep, which is generally sufficient for most medium to small plant pots. For larger containers, it might be a tight fit. The open design offers mixed options – air circulation is quite good if each side is open, for example if you remove the back panel or position the modules accordingly. With the back panel attached, airflow is reduced but the unit is more stable.

About the surface: typical for IKEA furniture is a melamine resin-coated surface, which is relatively durable and easy to clean if soil or water spills occur. Still, I would recommend placing a waterproof mat or possibly absorbent cloths under the pots to prevent waterlogging and moisture damage as much as possible.

One more question for you: how large is your conservatory, and do you plan to place the Kallax units directly against the window or rather use them as freestanding shelves nearby? This could affect both stability and moisture exposure.

Best regards!
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klo40
22 Sep 2020 11:23
Good morning,

I agree with FAZAR and would like to add a few practical tips for using Kallax as a windowsill in a conservatory:

1. Load capacity: Kallax can handle quite a bit, but the weight of the plant containers and substrate adds up quickly. A maximum of about 15 kg per compartment (33 lbs) is safe, but it’s better to leave some margin.

2. Moisture protection: Since the boards are made of wood-based material and are sensitive to moisture and swelling, be sure to use waterproof mats or small saucers.

3. Ventilation: Ideally, you should remove or at least perforate the back panels to allow excess moisture to escape. This prevents mold and improves air circulation for the plants.

4. Cleaning: The surface can be easily wiped with a damp cloth. However, standing water should be avoided to prevent damage to the boards.

5. Assembly: If you plan to stack multiple Kallax units, make sure to screw or connect the elements together. This provides additional stability, especially under heavy loads from plant containers.

I hope this helps. Many have also found it useful to place drainage trays under the pots to protect the furniture further.

Best regards!
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FLONE41
22 Sep 2020 14:07
Hello revin49,
I find your topic really important because when it comes to plants in a conservatory, we not only want space but also an environment that truly benefits the plants.

I once had a similar shelf for my plants, but I was unsure whether the wood would suffer from excessive moisture. That can be really worrisome, especially when watering plants and some water spills.
klo40 schrieb:
"ideally, you should remove or at least perforate the back panels so that excess moisture can escape."


Unfortunately, I didn’t do that, and later mold appeared on the back panel. That’s why I strongly recommend paying attention to ventilation – it was a valuable lesson for me.

How do you handle watering? Do you use saucers or watering habits that protect the shelf? Do you also know if the surface of the Kallax units is prone to scratches?

Looking forward to your reply, as I’m also considering buying one again but with better preparation. 🙂
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revin49
23 Sep 2020 07:52
Thanks in advance for your detailed and helpful answers!

Regarding the setup: My conservatory is about 4 meters (13 feet) long and half as deep. I plan to place the Kallax unit directly against the window, especially along one side where it gets plenty of light. It’s mainly for small to medium-sized plants, many of which are in terracotta pots, so the weight certainly needs to be considered.

My watering habits are rather cautious; I usually make sure not to cause any waterlogging, but some water may drip onto the shelving during routine care.

@FLONE41 Your tip about ventilation is very helpful! I’m thinking I will try to remove or at least modify the back panels.

I’m also curious about how you maintain the Kallax units over longer use. Are there any recommendations for protecting the wood panels or cleaning in case of heavy dirt buildup?

Looking forward to your thoughts!
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Mufato
23 Sep 2020 09:14
Hey,

I also use Kallax in my conservatory. To keep it simple: place pot feet under the plant pots and use trays to catch water. This way, the shelf stays dry and stable.

Wipe it down once a month with mild dish soap, and that’s it.

Don’t overload it, and the shelves hold up very well.