Bottle Garden Replacement Sponges (Set of 3)

Rating: 5.0 out of 5 (1)


This 3-pack of Smart Soil Replacement Sponges is a refill kit for our Bottle Gardens. Contains 3 sets of sponges, 3 bottle labels and 3 germination stickers

Made In The US

Recyclable Packaging


  • 3 x sets of grow sponges. Note that there is a top and bottom sponge!
  • 3 x bottle labels
  • 3 x germination stickers

In addition to these sponges, you will also need some seeds. We include more seeds than are needed to get started with the bottle garden kits, so hopefully you have some leftover! If not, we do offer seeds separately as well.


750 mil bottle with water

Add bottle garden insert

One per bottle

Sprinkle Seeds

3-5 should be enough

Apply germination sticker

To assist with germination


In a moderate temperature location with at least a few hours of sunlight for germination.


Once sprouted, make sure these plants get at least 6 hrs of direct sunlight per day

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

Share your best answers

Check Out Some Of Our Other Products

Share your best answers

Customer Reviews

Based on 1 review
Elaine DuBois
Smart soil replacements kits and bottle top planters

They are great. I will be ordering more soon. I was using another company's bottle top replacements to use my own potting soil. 2 problems...first their units were too large (.75 ") for my wine and cobalt blue beer bottles and so the dirt came out if the bottom, not leaving enough room for roots to grow into bottle. Therefore, your bottle top units and your soil replacements are the way to go as they fit the bottles I want to use. I GIVE THEM BOTH A RATE OF 5+. Thanks