Park's Double 120-cell Bio Dome

Double 120-Cell
Item #39920


The Revolutionary Seed-Starter -- Now in DOUBLE Size!

Start 120 of the healthiest, best-rooted seedlings you'll ever grow in this new DOUBLE Bio Dome!

A Park Seed Exclusive!

Park's Original Bio Dome Seed Starter revolutionized indoor seed-starting. Now we're proud to introduce the DOUBLE version of this mini-greenhouse, which grows up to 120 big, healthy seedlings!

When we say that this seed-starting system from Europe is revolutionary, we really mean it! Now you can start your favorite vegetables and flowers indoors, for earlier crops at a fraction of the cost of buying plants. And you can select the varieties YOU want (not the half-dozen choices the local garden center picked out), confident that with Park's Double Bio Dome, your seeds will sprout and your sprouts will transplant easily into the garden!

This little powerhouse from Holland bears almost no resemblance to other seed kits, which tend to produce spindly sprouts with curled-up roots and limp stems. Park's Double Bio Dome seedlings grow to a uniform height and width, thanks to the spacious distance between each growing cell. And our growing medium -- the Bio Sponge -- encourages root growth downward, NOT in an upward spiral that eventually strangles the plant! With the Bio Dome, you place only one seed in each Bio Sponge, which really helps stretch out today's smaller seed-count packets. The only seeds unsuitable for the Bio Dome are very large ones (which you would want to direct-sow, anyway) and root vegetables needing space to grow their tuber, such as carrots, beets, and radishes.

Before and after germination, your seeds receive just as much light, water, heat, and air circulation as they need, thanks to the adjustable vents and bottom-tray watering design of the Double Bio Dome. This environment offers such great growth conditions to the emerging seedlings that Bio Dome plants are usually ready to transplant a bit quicker than other seedlings -- and they suffer virtually no transplant shock in the garden.

Here's what you get with Park's Double Bio Dome Seed Starter system: 1 double sized black bottom tray, 1 clear plastic vented cover, 2 60-cell planting blocks, 120 Bio Sponges, and a free packet of seedling food. The double base measures 20 1/2" long x 16 1/2" wide x 3 1/2" high, while the clear top measures 20 1/2" long x 16 1/2" wide x 6" high. Original planting cells are 1" wide x 2 1/4" deep.


Skip Product Specs
Item Form Accessories
Color 120-Cell
Size Double
Restrictions *Due to state restrictions we cannot ship to the following:
Canada, Guam, Puerto Rico, Virgin Islands

Product Review Summary

Based on 3 reviews
The average rating for this product is 5 out of 5 stars
Overall Rating: 5.0/5.0

Customer Reviews

March 31, 2019


This shopper rated the product 5 out of 5 stars

This is an excellent system. If you mix seeds within a dome be sure they germinate around the same time.

Laura from
February 25, 2019

Best thing ever!

This shopper rated the product 5 out of 5 stars

I rarely bother to write a product review even if I like a product but this is the best system ever!! 2nd year I used it & just as last year I was amazed at how quickly the seeds germinated and all of them did. So easy too! Well worth the investment. Also love that I can get very interesting varieties of seeds to grow that you can't find locally. Go for will be glad you did.

Helen Buol from GA
May 05, 2018

Bio Dome 120 cell

This shopper rated the product 5 out of 5 stars



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