AeroGarden Compatible Grow Sponges (50 pack)

Rating: 4.9 out of 5 (10)


Most grow sponges are made from peat moss, the mining of which releases vast amounts of carbon into our atmosphere. The Urban Leaf grow sponges offer the same performance, but instead of being made from peat, we use coco coir - which is an agricultural by-product offering very similar water retention properties as peat.

These sponges differ from our Bottle Garden 'Smart Soil' kit in two ways 1) they are a different material (coco coir vs pine bark based) and 2) they are not pre-treated with hydroponic plant food. In order to use these sponges you would need to add liquid plant food separately.

Made In The US


Recyclable Packaging


50+ hydroponic grow sponges in a recyclable bag

Because coco coir is a more sustainable alternative to peat moss! We look forward to a day when the gardening industry moves away from using peat moss entirely.

Sponges have a small divot on top for placing seeds.

This is a replacement part for an Aerogarden unit and some other countertop hydroponic kits

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Why do we use it?

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Which Microgreens Kit Is Right For You?

Growing Methods hydroponic Hydroponic hydroponic soil soil hydroponic
Growing Medium Proprietary ‘seed quilts’ made from coconut fiber Virgin fluff fibers produced from non-chlorine bleached spruce wood none coco coir coco coir Jute matt
Includes a light no yes no no no no
Included seeds 2 varieties - varies 3 varieties Red Cabbage, Radish and Mustard none 4 varieties. Radish, Arugula, Beets and Tatsoi 4 varieties. Arugula, Beets, Komatsuna and Radish 6 varieties. Radish, Kale, Rainbow Mix, Mustard, Spicy Mix and Broccoli
USDA Organic Seeds? Some, not all Yes NA No No Yes
Grow Area 1 x Large 3 x Medium 1 x Medium/Large 1 x Small 1 x Medium 3 x Small
Refill Cost $$ $$$ $ $$ $$ $$

Which Grow Light Is Right For You?

Wattage 20W / 40W 20W 11W 16W / 32W 7W
PPF Small: 23.7 μmol/sec; Large: 42 μmol/sec 25.95 μmol/sec 17 μmol/sec - 7.3 μmol/sec
Efficacy (PPF/W) 1.05 - 1.2 1.3 1.55 - 1.05
Color Temperature 3000K 3000K 3000K 3914K 2700K
Mounting Hanging from wall or ceiling Inside a pendant or desk lamp Under cabinet or on a wall Under cabinet, wall or vertically Inside a pendant or desk lamp
Suitable For Anything Anything Houseplants, Herbs, Leafy Greens Anything Small herbs, seed starting
Water Resistant No No No Yes No
Cost $$$ $$ $$ $$ - $$$$ $

Check Out Some Of Our Other Products

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Check Out Some Of Our Other Products

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They are the same size as the sponges that come in an Aerogarden kit.

No, they are 100% proudly made and packaged in the US.

Our sponges are made from coco coir - a by-product of coconut processing (it’s the outside part). Not only is coco coir more sustainable compared to other materials like peat moss, but some people believe it also does a better job of managing pH.

Thanks for the question. If you’re going to be storing these Aerogarden-compatible grow sponges then we recommend drying them out on a rack or try first. If there’s no moisture, there’s no mold.

You have to cover the top of each pod to let in as little light to the tank as possible. If not, you are creating the perfect environment for mold and algae growth. Hope that's helpful!

Customer Reviews

Based on 10 reviews
Amanda Eayrs (Glastonbury, US)
Great purchase

Great way to start seeds and grow herbs in Aerogardens. Fast shipping, friendly customer support.

Barbara K. Byers

Work with Aero Garden! These pods work perfectly with the Miracle Grow Aero Garden and are so enexpensive!

Lowell Beaman (Atwood, US)

They work good.