Park's Double Bio Dome with 80 Jumbo Cells

Double 80-Cell
Item #39780


This "mini greenhouse" lets you control climate and conditions for best germination!

Bigger, healthier, better-rooted seedlings every time -- and twice as many of them!

A Park Seed Exclusive!

Park's Original Bio Dome Seed Starter revolutionized indoor seed-starting. Park's Original Bio Dome with 40 Jumbo Cells increased the size and root development available to new seedlings. And now we're proud to introduce the DOUBLE version of this mini-greenhouse, which grows up to 80 big, healthy seedlings! This system is so over-the-top successful that we have given it our name, so you know you're getting the very best!

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 with 80 Jumbo Cells Seed Starter system: 1 double sized black bottom tray, 1 clear plastic vented cover, 2 40-cell planting blocks, and 80 Jumbo 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. Jumbo planting cells are 1 3/8" wide x 2 1/2" deep.


Skip Product Specs
Item Form Accessories
Color 80-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 4 reviews
The average rating for this product is 4.5 out of 5 stars
Overall Rating: 4.5/5.0

Customer Reviews

October 18, 2022

Double biodome

This shopper rated the product 5 out of 5 stars

I’m looking forward to using this big BIODOME. It’s so sturdy. I don’t have a professional setup in my house with lights and heat so I’m thinking the tall cover will be handy for early spring to introduce my plants outdoors when chilly weather would otherwise retard their growth. And changing out plugs will be so much better than the potting soil I’m currently using.

Janice Gray from KY
March 09, 2018

Great Company

This shopper rated the product 5 out of 5 stars

Also as to the two reviews, reading the online instructions, it says: After the seedlings have emerged, remove the dome and provide more light. Use a grow light kept 1”-3” above the plants as they grow. This will prevent the seedlings from stretching and producing a weak plant. Brighter light will help keep the seedlings short and stout. Water as often as needed to keep the plugs moist. Also, I was missing the white tray in my Dome Order. Called and the Company offered to send it right away, no questions asked. Truth is the order came last year and I never had the time to call. I was so relieved and pleased that they respected my request without hesitation. That's a Great American Company! Thank you, Park Seeds

Southengland from FL
April 30, 2017

BioDome Lid

This shopper rated the product 3 out of 5 stars

I agree with Jim on the lids. They are kind of tall. Should have been shorter like 3 inches. And they take up space for such a short time to use them. Other then that the rest is nice.

Jackie from DE
March 16, 2017

Works really well, dome a bit tall

This shopper rated the product 4 out of 5 stars

I've used the 60 and had very good results, most of the time over 90% germination. Watering is extremely simple and pretty much foolproof. This year added several 120s, only complaint and reason for 4 instead of 5 stars is the dome on 120 is too tall. Had to raise my lights and then lower them after taking off dome. With dome on lights are pretty far away. At minimum should be the same height as 60 version Even for the 60 a little shorter dome would be ideal for my purposes.

Jim K from NC

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