36 Pack Refill Sponges for the 18-cell Planting Block

36 Pack Refill Sponges for the 18-cell Planting Block

Time for Another Crop in the 18-Cell Bio Dome!

This rooting medium is intended for use with Park's Bio Dome with 18 Cells seed-starting system.

Item # 09323-PK-36
In stock - allow 3-5 business days for order processing prior to shipment.
Item Form Pack of 36
Size 18-cell (Pack of 36)
Restrictions *Due to state restrictions we cannot ship to the following:
Canada, Guam, Puerto Rico, Virgin Islands

Review Summary
(Based on 6 Reviews)

5 star rating
Overall Rating: 5.0 / 5.0


5 star rating
Cathyanne from ID wrote on February 23, 2022

I love the Park Seed Bio-Domes. I have 16 of them and they are super for starting seeds. I am a certified Master Gardener in Idaho and grow a lot of flowers. This year I started over 400 seeds and these Bio-Domes make my life so easy. We have white carpeting (YIKES) in my seed lab and my first years I had quite the mess, trying to use small starting pots with soil. These domes keep the humidity perfect and I can watch the roots develop as well. Don't hesitate - they are seriously the best for seed starting. I tend to like the 18 plug dome over the 40. But for marigolds and zinnias the 40 are best as I grow a lot of those.

5 star rating
Have worked great for years
KY square foot gardener from KY wrote on October 30, 2018

quick and convenient Very easy to replant in the beds. I have kept zinnias in this medium with open biodome for weeks while I waited to see how various flowers would thrive in the garden and then replace in the bed as some planted weak plants faultered. I clean the biodome with dilutedbleach at the end of season.

5 star rating
Very Good product
RonB from NJ wrote on March 31, 2015

Great product and very easy to use. Seeds sprout and grow easily by following the simple instructions and providing the proper light.

5 star rating
Happy with Bio Dome Seed Starter
Jeannine Loncar, Experienced Home Gardener from CO wrote on March 24, 2014

First time user of the Bio Domes and the growing of petunias. Very happy with results. I have had 85-90% success in Park Seed petunias. Germination in 4 days using grow light and heat mats. Yesterday started tomato and pepper seeds. I liked the no mess in the house and ease of watering. Will definitely be buying more to the five I already have.

5 star rating
Love the Bio Dome
New Grandpa from TX wrote on December 21, 2013

Parks Bio Domes are great. Follow the instructions and you can not go wrong. Parks also has a great support line.

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