Oyas: The Art of Ecological Irrigation for Your Plants
What if you never had to worry about watering again? Oyas are porous terracotta pots that have been used for centuries to water plants autonomously and economically. A single fill is enough for several days of natural watering, right at the root. Find out why oyas are revolutionising indoor and vegetable gardening.
What Is an Oya?
The oya (pronounced “oh-ya”) is a porous clay container that you bury near your plants, with the opening left in the open air. Filled with water, it slowly releases moisture directly to the roots by osmosis — dry soil draws the water out, while moist soil slows the release. The plant takes exactly what it needs, when it needs it.
This irrigation system has existed for more than 4,000 years in China, India and Africa. Today it is enjoying a major revival in the face of water-conservation challenges.
Why Are Oyas So Effective?
1. Considerable Water Savings
The water is released directly to the roots, with no loss through evaporation or surface run-off. Oyas can save up to 70% of water compared with traditional watering. In a drought or when you’re away on holiday, it is an ideal solution.
2. Healthier Plants
Plants adapt naturally to the oya by developing deeper roots that seek out the moisture around the pot. The result: they become more resistant to water stress and to climatic variations. Watering at root level (rather than at the surface) also reduces the risk of leaf diseases linked to humidity.
3. Autonomous Watering
A standard-size oya needs refilling every 4 to 10 days depending on its size, the plant and the climate. Ideal for short absences, busy people or simply to simplify your watering routine.
4. Universal Compatibility
Oyas adapt to every setting: vegetable beds in the ground, indoor pots, balcony planters, raised beds. They suit all plants — vegetables, herbs, flowers, shrubs, tropical plants.
Our Jungle Feed Oyas
🌿 Ceramic Oyas — Different Sizes Available
Our handcrafted ceramic oyas come in several sizes to suit your pots and your plants. Made from natural clay, they release water gradually over days.
How Do You Use an Oya?
- Dig a hole near the plant (in the ground) or place the oya in the compost of a large pot
- Bury the oya up to the neck, leaving the opening accessible
- Fill with water (tap or rain water, with nothing added)
- Cover the opening with a stopper or a small stone to limit evaporation and keep mosquitoes out
- Refill when the oya is empty (every 4 to 10 days depending on conditions)
Which Oya Size Should You Choose?
| Oya size | Volume | Suitable for | Refill frequency |
|---|---|---|---|
| Small | ~0.5 L | 15–20 cm pot, herbs | 4–6 days |
| Medium | ~1–2 L | 25–35 cm pot, vegetables, foliage plants | 5–8 days |
| Large | ~3–5 L | In the ground, raised beds, shrubs | 7–10 days |
FAQ: Your Questions About Oyas
How do I install an oya?
Dig a hole near the plant, bury the oya leaving the opening in the open air, and fill it with water. For an indoor pot, choose an oya suited to large containers.
How often should I fill an oya?
It all depends on the size of the oya, the plant and the season. In general, every 4 to 10 days. In summer (intense heat and evaporation), fill it more often. In winter, the oya can last 2 weeks.
Which plants are oyas suitable for?
All plants: vegetables, flowers, shrubs, herbs, houseplants, potted fruit trees. Oyas are particularly popular for tomatoes, courgettes, peppers and any plant that dislikes going short of water.
Does an oya need any special maintenance?
Clean the oya once a year with clear water to remove mineral deposits (limescale). In winter, empty it if it freezes where you live (the clay can crack). Otherwise, no special maintenance.
Can you use an oya in an indoor pot?
Yes, for large pots (30 cm in diameter and over). Choose a small oya and wedge it firmly in the compost. Particularly useful for houseplants with a high water requirement (Monstera, Calathea, ferns).
Does an oya attract mosquitoes?
The water inside a buried oya poses no risk (mosquitoes lay their eggs on the surface, not in the soil). Simply cover the opening with a stopper to rule out any risk.