Concrete Planter Care: Guide to Drainage, Lining & Watering Tips
Updated: Sep 2
Concrete planters are a stylish and sustainable way to elevate your indoor or outdoor space. But to keep both your plants and pots in top shape, it’s important to understand how to care for them properly. From drainage to lining and water absorption, here’s everything you need to know about concrete planter care.
Do Concrete Planters Need Drainage Holes?
It depends on how and where you plan to use the planter.
Drainage holes are generally recommended because they allow excess water to escape, which helps prevent root rot.
However, the need for one depends on a few factors:
🔸Indoor vs Outdoor Use
Outdoor planters are more exposed to rain and need drainage to avoid waterlogging, especially during wet months.
Indoor planters can sometimes go without drainage holes if you're careful with watering and use a drainage layer at the base.
🔸 Type of Plants
Succulents, cacti, and herbs prefer dry conditions and must have good drainage.
Moisture-loving plants like ferns or peace lilies may cope better without holes – as long as you monitor soil moisture closely.
🔸 Your Watering Style
If you’re confident and consistent with how much you water, a no-hole planter can work with proper precautions.
If you tend to overwater, having a drainage hole is a safer choice.
🔸 Alternative Setups
You can use concrete planters as decorative cachepots – just place the nursery pot inside and remove it to water.
Or use a plastic liner with holes inside your concrete pot, combining style with practicality.
Drainage holes are ideal, especially outdoors or for plants sensitive to overwatering. But with the right setup, hole-free concrete planters can still work beautifully indoors.
Read more on 'How to Safely Drill Drainage Holes"
Tip: Elevate your planter using pot feet to improve drainage and airflow.
Raising your concrete pot slightly off the ground prevents water from pooling at the base, reduces the risk of root rot, and promotes healthy airflow under the planter—especially important for outdoor use.
Want better drainage and a cleaner look? Pair your planter with pot feet for better airflow and moisture control. Here’s why pot feet are worth using.
What to Put in the Bottom of a Concrete Planter for Drainage
If you prefer not to drill a hole, create a false drainage layer using:
Pebbles or gravel
Broken ceramic or terracotta
Activated charcoal (especially for indoor planters – it helps with odour and mould)
Tip: Add a piece of mesh, gauze, or a coffee filter on top of the drainage hole to keep soil from slipping out of the pot or clogging up the drainage hole
Should You Line a Concrete Planter?
Lining is optional but helpful, especially indoors. A waterproof liner or sealant can:
Prevent moisture loss from the soil
Stop lime leaching, which may affect sensitive plants
Extend the lifespan of your planter
Choose between:
A plastic liner pot inside
A liquid concrete sealant (applied before potting)
Do Concrete Planters Absorb Water?
Yes – they’re naturally porous unless they have been sealed with a concrete sealer. This means:
Water can seep into the walls
Soil may dry out quicker, especially in warm weather
Over time, your planter will develop a natural, aged patina
If you’d like to reduce water absorption:
Seal the interior
Water more frequently
Choose drought-tolerant plants, like succulents or cacti
Seasonal Care for Concrete Planters
Spring: Clean and Check
Rinse off loose dirt, then scrub with warm water and a splash of white vinegar or a little mild soap, using a stiff brush. For stubborn marks, leave a paste of baking soda and water on for 10 minutes before scrubbing. Let the pot dry completely, then look for hairline cracks before you plant. Small ones are easy to fix: see concrete repair tips.
Summer: Shade and Water Wisely
Water in the early morning or evening. Cold water poured into a pot that has been baking in the sun can cause fine cracks or surface flaking. In a heatwave, move pots into partial shade during the hottest hours, or turn them now and then so lighter finishes fade evenly.
Autumn and Winter: Protect Against Frost
Concrete is porous, and water trapped inside it expands when it freezes. Before the first frost:
Empty and clean any pots you aren’t overwintering, then let them dry fully.
Reseal with a breathable sealer. Here’s how to seal concrete planters without harsh chemicals.
Lift them on pot feet or bricks so they don’t freeze to wet ground.
Shelter planted pots against a house wall, add a layer of mulch and water sparingly before a cold snap.
Store small pots in a shed, or upside down and off the ground. Cover with horticultural fleece rather than plastic, which traps moisture.
Common Concrete Planter Mistakes
Leaving it unsealed. Unsealed concrete soaks up water like a sponge. Reseal once a year.
No way for water to escape. Never leave a planter standing in a full saucer. No hole? Drill one safely or use a plastic nursery pot inside.
Ignoring white powder. That chalky film is efflorescence, salts drawn out by moisture. Here’s how to remove it and other stains.
Moving full pots roughly. A heavy, filled planter on uneven ground is under strain. A lightweight liner pot inside makes moving and replanting easier.
Concrete Planter Care: Final Thoughts
Concrete planters are beautiful, timeless, and hard-wearing – but they do need a little know-how. By managing drainage, choosing the right liner, and understanding how they interact with water, you’ll create a healthy home for your plants and preserve your pot for years to come.
FAQ
1. How do I improve drainage in concrete planters?
To improve drainage, ensure your concrete planter has adequate holes at the bottom. You can also add a layer of gravel or mesh before the soil to prevent water from pooling and causing root rot.
2. Do I need to line a concrete planter before planting?
Yes, lining your concrete planter with landscape fabric, plastic sheeting, or a coconut liner can help prevent soil leaching and reduce the effects of concrete alkalinity on plant roots.
3. How often should I water plants in a concrete planter?
Watering frequency depends on the type of plant and the local climate. Generally, concrete retains heat, so planters may dry out faster in hot weather. Check soil moisture regularly and water when the top 1-2 inches feel dry.
4. Can concrete planters damage plant roots?
Unsealed concrete can leach lime, raising the pH and potentially harming sensitive plant roots. Sealing the planter or using a liner can prevent this issue and protect your plants.
5. What are the best plants for concrete planters?
Succulents, herbs, ferns, and ornamental grasses thrive in concrete planters due to their good drainage. Select plants based on the availability of light and the size of the planter for optimal results.
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