Parks Original Bio Dome 60 Cell Seed Starter

Park's Original Bio Dome 60 Cell Seed Starter

The Revolutionary Seed-starting System for Years of Perfect Germination!

60-Cell Original
Item # 06529
Instock - allow 2-5 business days for processing prior to shipment.
Buy 2+ at $27.95 ea
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 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 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 (carrots, beets, radishes, etc). Everything else, from Impatiens to Petunias to Tomatoes, does beautifully in these perfectly constructed Bio Sponges!

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 Park's 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 exactly what you get with this: the Bio Dome itself (green bottom tray and vented clear plastic top), planting block, 60 Bio sponges, seedling food, and complete instructions! Refills of the Bio Sponges are always available here at Park. And if you want bigger seedlings, we have a 40-cell and even an 18-cell size too. The good news is that their planting blocks fit into your standard Bio Dome, so you can swap out the planting blocks without having to purchase another Bio Dome. But if you're like us, you'll have 2 or 3 always full of seeds and seedlings before you know it!

The green base measures 14 7/8" long x 9 1/2" wide x 2 1/4" high, while the clear top measures 14 7/8" long x 9 1/2" wide x 4 1/2" high. Original planting cells are 1" wide x 2 1/4" deep. Start growing the best garden of your life from seed right now using the Bio Dome -- and continue for a lifetime! This is our all-time bestselling product, and one glance at the customer comments will show you why. Happy sowing!

Review Summary
(Based on 21 Reviews)

Overall Rating: 5.0 / 5.0


Can't beat it
Bob from MA wrote on April 03, 2018

Bought this last year and planted tomatoes, cucumbers, and zucchini. They sprouted within a week and had plenty for the summer. Thanks for a great product!

Great for Long Germination Seeds
Pam M. from AR wrote on March 24, 2018

I tried three different methods of seed starting this year: three Park biodomes; a DIY version using peat pods and plastic domes; and the standard plastic seed starting kit with a base, individual cells, and a humidity dome. I can start first off by saying that my great idea with with a DIY version ended extremely badly. My mini greenhouses outside have been pushed over by the wind multiple times (I finally had staked them this morning). The seedlings in the peat pots were the most damaged. Those in the classic seed starting combination kit pretty squished, but they survived. None of the seedlings in the bio-domes were harmed. In addition to surviving my poor planning, the biodome seedlings have also done really well. In general, I think they germinated a little bit faster than the other methods. This was especially noticeable with my strawberries and peppers. Personally, I disagree with Park's assertion that you can leave the seedlings in for the whole time. It depends on the plant. When I pulled the pumpkin seedlings up to repot them, one had ten inch roots! (I know you're supposed to start then in the garden... but I wanted to experiment.) With the others, I'm repotting them once multiple roots are on the surface of the sponge or once the roots go on a tour of the water reservoir. I do wish I had some idea, any idea, of what these sponges are made of. Still, it's an interesting method which I fully intend to utilize next year.

Seed Starting Magic
Jackie Ashley from SC wrote on March 01, 2018

I have been starting seeds and growing vegetables for 50+ years. I do not bother writing reviews, but I had to review this great product. I used this kit to start tomatoes, cucumbers, and peppers. The cucumbers were sprouted in two days. The tomatoes were up in 6-8 days. The peppers were up in 10-12 days. 97 % germination rate. I used a 48 watt(really only 24 watts) 10.5"x 10.5" LED flat light and heat pad. The light almost touched the crown of the Bio Dome lid. I also used my standard tray with seed starting soil and T5 lights and so far the germination rate is 11%. I am excited that these Bio Domes are almost fool proof. The plastic top is thicker than the competitors and has great clarity. The condensation also goes back in the tray, not all over my shelves. They are worth every penny. Sometimes these newer technologies really do work.

Five Stars
RACHEL from WI wrote on March 01, 2018

4th year using the bio dome. Work great!

Grows great seedlings, but doesn't last 6 weeks
Becky from TX wrote on February 19, 2018

I got these biodomes to try for my seeds this year. They've been in them for 3 weeks and they've already outgrown their sponges. I have 2-4 inches of roots hanging out the bottom! So now I've had to order pots to transplant them, and hopefully I can manage to fit all those pots under my light. One star knocked off for not lasting the 6-8 weeks as stated, but still a nice system.

What are the differences between the various Bio Domes: 60-cell, 40-cell, and 18-cell?
Bio domeThe original 60-cell Bio Dome has a 60-cell planting block with 60 Bio Sponges and will produce 60 plants at one time. The 1" wide by 2 ¼" deep cells are larger than average, and a spacious 1 3/8" apart. The bio-sponges are the same size as the cells; 1" wide by 2 1/4" deep. You can grow and keep plants in the 60-cell bio-dome for 6-8 weeks before transplanting. Many varieties will just need 6 weeks until transplanting. Tomatoes and peppers would appreciate the full 8 weeks before transplanting. So, the original 60-cell bio-dome would be great for starting all of your favorite vegetable and flower seeds, with a larger number of plants produced at one time.

The 40-cell Bio Dome has a 40-cell jumbo planting block with 40 Bio Sponges and will produce 40 plants at one time. The cells are wider and deeper than the original 60-cell planting block and provide good spacing to maximize air flow. The cells are 1 1/4" wide by 2 1/2" deep. The Bio Sponges are also 1 1/4" wide by 2 1/2" deep. You can grow and keep plants in the 40-cell bio-dome for at least 6-8 weeks and some for up to 9-10 weeks, because of the wider spacing and cell/sponge size. It too would be excellent for starting all your favorite vegetable and flower seeds, with the added benefit of giving more room and time for larger plant development.

The 18-cell Bio Dome has an 18-cell whopper planting block with 18 Bio Sponges and will produce 18 plants at one time. It has the largest cells of any of the Bio Domes we offer and is great for growing extra-stocky transplants and even for rooting cuttings. The cells are 3" tall by 1 3/4" wide. The Bio Sponges are also 3" tall by 1 3/4" wide. You can grow and keep plants in the 18-cell Bio Dome for at least 8-10 weeks and some for up to 12 weeks, giving the maximum amount of growing time and spacing between plants as compared to the 60-cell and 40-cell Bio Domes. If you are looking to grow your favorite vegetable and flower seeds into large, stocky transplants for setting out in spring, then the 18-cell Bio Dome is the one you want to buy. It would be excellent for growing Tomatoes and Peppers.

How much water should be put in the Bio Dome and how often?
SeedlingsThe beauty of the Bio Dome is that you cannot overwater! You just keep water in the tray and float the block. The larger the seedlings get, the more water they will use and you will need to add water more frequently as they grow. Initially, during germination, you may not have to water as frequently, because minimal water is being used and Bio Sponges will stay moist longer, so you may only have to water once every 1-2 weeks. Later, as plants grow and water use is greater, depending on the room temperature and the amount of light received, you may have to water more often -- possibly 1-2 times a week -- or as often as required to keep the sponges moist.

Bio Dome Instructions

Remove the Bio Dome Styrofoam blocks from the plastic wrap, keeping upright so that the plugs do not fall out. The plugs are ready to sow as they are!

For most seed types, place seeds into the pre-dibbled hole at the top of each plug. Tiny seeds that need light to germinate should be sown on the surface of the plug, not in the hole. Seeds do not need covering in the Bio Dome plugs. Each plug provides the optimum environment for germination.

Place the germination units in a favorable location as indicated on the seed packet.

To moisten the plugs it is best to soak them from the bottom. This can easily be done by putting water into the under trays provided and floating the Styrofoam blocks. It is not possible to over-water by this method.


Place the dome on the Bio Dome to maintain the humidity around the planted plugs. Keep moist until the seedlings emerge. Because of their composition, the plugs retain just the right amount of water. Less frequent watering may be needed and there is no danger of overwatering as with some other germination methods.

When you see that germination has started, open the vents on the Bio Dome. 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.


Once the seedlings have developed their first set of true leaves, mix a weak fertilizer solution, following directions on the free fertilizer packet included with your Park's Bio Dome Seed Starter shipment. Water with this solution, instead of plain water; until the next set of true leaves develop. You can increase the concentration of the fertilizer solution once the second set of true leaves develop.

When the second true leaves appear the seedlings are strong enough to be transplanted. Transplant your seedlings, plug and all. To remove the plug from the block, poke out from the bottom and plant them where the plants are to grow.

If weather or timing delays your transplanting, often the roots will emerge from the bottom of the plugs. Prop up the blocks to allow some air space beneath them, until you are able to transplant but don't allow the plugs to dry. This builds a stronger root system within the plug.

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