Deep Root Watering Vessel

By GrowOya

Starting at $24.95

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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.

  • Material: 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 24" apart, coverage area of up to 2 ft.
  • Small Oya is designed for patio or porch pots and planters–small growing spaces of up to 2 feet long and/or wide. This versatile size can be planted in any garden space with 6 inches of soil or more
  • Medium Oya is great for planter boxes, small raised beds, and larger containers. A 6’ x 3’ raised bed is perfect with 2 medium Oyas
  • Comes with silicone lid to keep evaporation in and critters out (mosquitos, lizards, and other insects)
  • Sizing Chart
  • Made in China
  • Dimensions: Small: 5" x 7"; Medium: 7" x 10"
  • Weight: Small: 1.66 lbs; Medium: 4 lbs
  • Fluid Capacity: Small: 33.81 fl. oz.; Medium: 101 fl. oz.

26 Reviews (4 out of 5 Grommets)

Sorted by Rating

Great concept but....

7/5/2015 by Will

I fill these up and they last 3 days tops. Not the 5 as described. My plants are happy tho!!


Works well but limited range

5/25/2015 by Charlotte

I bought two small oyas for a couple of small planters. They work as advertised, but I miscalculated the number I would need. The coverage is less than I had expected and they needed refilling twice a week at least.

It may have been partly because I buried them after the plants were planted so they weren't in the ideal position, but I think two small oyas per planter were needed. They do work, but I'll have to buy more and replant the planters. It would also be handy if the manufacturer made corks available that fit the mouths of the units.
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Not excited

5/15/2018 by Nancy

My husband is an avid gardener and travels a lot so I thought I had a winner but he was disappointed



1/17/2019 by Christine

didn't hold enough water for the area that was purchased for


total waste of money

7/18/2015 by Will

i bought several of the small grow oya's which i reviewed as OK these bigger ones drain in about a day an expensive mistake dont fall for it the claims


GrowOya's Response:
Thanks Will. Your larger Oyas will take a few weeks to get settled in. Once they do you'll see improvement in the fill days—your plant's roots will find the Oya underground and efficiencies will improve. Stick with it, you'll see the difference!
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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.