Large Oya

By GrowOya

$39.95 More on the way


This porous terracotta vessel waters plants naturally and efficiently, right at their roots. With the Oya, the water doesn’t run off or evaporate like it does when you water at the surface. Simply plant the Oya in the ground and fill with water every few days. Your plants get exactly what they need and you save water and time.

  • Materials: Terracotta
  • Care: Remove from soil before the ground freezes. Rinse with water
  • Saves time: Water only every few days
  • Saves water: Surface water is inefficient. Watering slowly at the roots produces a water saving up to 50-70%
  • Higher yield: Well watered plants produce more flowers and more food
  • Plant 48" apart, coverage area of up to 4'
  • Comes with silicone lid to keep evaporation in and critters out (mosquitos, lizards, and other insects)
  • Large Oya is designed for larger-scale intensive growing, like urban farmers, community gardens, or the raised bed farming family. A nice big 8’ x 4’ garden bed is perfect for two large Oyas
  • Sizing Chart
  • Made in China
  • Dimensions: 10" x 13"
  • Weight: 5.5 lbs.
  • Fluid Capacity: 220 fl. oz.

9 Reviews (3.4 out of 5 Grommets)

Sorted by Rating

Oya planted in 4 foot circular container


Today I placed my first large GowOya in a 4 foot circular container. It is surrounded by pepper plants, Swiss chard, and cilantro. The box indicates which are the best plants to use with it and which are not.More > < Less


question re new? product


Perhaps Mr. McWilliams would consider making something I've been looking for for some time. My grandmother used terracotta bell cloches to blanch her greens from early spring right through the summer. I haven't found any that block the light as hers did, but are either of glass or have holes in them. None of my makeshift attempts work as well as they did, either promoting mold/fungi or allowing light to penetrate.More > < Less


Great concept, easy to use, minimal work to set up.


So far, so good. I haven't had my oyas long (I have 9 large), but I can see already this is going to work very well. I am particularly interested in conserving water as I live in California and we are in the midst of a serious drought. The simplicity of this ancient concept, combined with the water conservation, really appeals to me and my husband. Previously, I had a drip system that always needed tending, and given the size of the drip system and the length that water needed to be pushed through, some plants got more water, others less. With this system you fill and forget it for a few days. That's it. Thank you GrowOya.More > < Less


great for between waterings


I placed two large Oya amongst my ferns which were planted under and around 3 dogwood trees. I was having a hard time keeping the ferns lookingooking fresh, they drooped between the bi-weekly watering of the bed.
Once I installed the 2 Oya jugs, the ferns did very nicely no matter how hot it got. With the bi-weekly watering of the bed, I only had to fill the jugs once a week. But if I skipped watering the bed, of course the jug would drain faster.
They do not replace watering your garden, but they do help between waterings.
More > < Less


Empties in a day.


Mine empties in a day, but not a problem--I water every day anyway, and the Oya assures water gets to the roots of the two tomato plants on either side of it.


GrowOya's Response:
Thanks John. Yes definitely less water (and watering) than surface watering. And I promise you'll see improvements in water usage after a few weeks buried. Roots will find the Oya and water use gets even more efficient.
More > < Less

Items 1 to 5 of 9 total

GrowOya - Deep Root Watering Vessel

About GrowOya

Dig This

It can be easy to forget to water plants and we often waste water when we do. GrowOya solves both issues, elegantly.

This terracotta watering system simplifies—and improves—the process of caring for your plants. Simply dig the Oya into the soil (with the spout exposed) and fill it up every few days. Boom . . . you’re done. The Oya and your plants work together to do the rest.

The Oya’s porous terracotta material releases water slowly near the roots, where it's needed. This method saves a LOT of water (up to 70%) because it reduces runoff and evaporation. Put one or more pots in places that the hose or sprinklers can’t reach. Or use them anywhere and everywhere for effective, efficient watering.

Founder Josh McWilliams wanted to water his rooftop garden sustainably. So when he discovered the “olla” (pronounced ‘oya’), an ancient way of gardening with terracotta pots, he saw a chance to change the way people care for their gardens today. Fellow Founders Kenny Torrance and Brant Cheetham joined and GrowOya was born.

With the time-honored wisdom of the Oya, you’ll save time, save water, and grow happier plants.