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

Park's Original Bio Dome 60 Cell Seed Starter

Item # 06529
Buy 2+ at $27.95 ea
Available to ship.

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

Big seedlings every time -- the easy way!

A Park Seed Exclusive!
Other Items in this Series:
Park's Original Bio Dome with 18 Whopper Cells Park's Original Bio Dome with 40 Jumbo Cells Bio Dome for Beginners Kit Pro Dome Mini Greenhouse
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, 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 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 what you get: the Bio Dome (green bottom tray and vented clear plastic top), planting block, 60 Bio sponges, seedling food, and complete instructions! 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.

Item Form Accessories
Color Original
Size 60-Cell
Additional Characteristics Seed Starting
Restrictions Canada, Guam, Puerto Rico, Virgin Islands
Overall Rating: 5 Stars
Average Based on 12 Reviews Write a Review
Great product!
Mary from NY wrote (February 24, 2014):
I bought this product two years ago based on the reviews, and it is great. Last year I had almost 100% germination rate! It is very simple to use, and if at some point I make my garden larger, I will order another one. I have recommended this product to my gardening friends.
The only one
from wrote (January 28, 2014):
The bio-dome is the only seed starting system I use!
Great For Beginners!!
Marci from MN wrote (April 16, 2013):
This is my second year starting my seeds indoors. Last year was a complete failure but this year I started them in the biodome. Best garden related purchase ever!! Just about every seed I planted has come up and I have had to do very little for this success. Plus, the plugs are easy to remove when it is time to transplant. Looking forward to a garden full of veggies and flowers this year. Thanks!!
best seed starters ever used!
S Boyd from OH wrote (February 26, 2013):
I've been using the biodome for nearly 10 years. I've tried multiple other products over the years (peat pots, jiffy 7s, dixie cups..) and recently have occasionally tired other newer methods as well, but nothing has ever worked as well as the Biodome. Consistent germination for every seed. I'm sold!
Terrific for Lettuce Transplants
Gardening for over a half century from VA wrote (December 28, 2012):
I bought the bio-dome specifically for starting lettuce transplants. Works like a charm. Small size of the plugs just right for setting out young plants, and using multiple domes for starting successive plantings. Has made starting and transplanting lettuce a cinch. Great for coordinating plantings for a CSA.
Nothing compares to this system
IMBabci2 from GA wrote (October 30, 2012):
I've been a gardener for decades and began using the bio-dome system for 2 years. Nothing compares to this system for ease and successful germination. I've regularly performed side by side comparisons of the bio-dome 60 and a typical seed starting system available in big box stores. Bio-dome consistently gives 80% - 95% germination even when using older seed. The others average 60% germination. With F-1 hybrid seed being higher cost it makes sense to use the best germination system.
some problems
dedicated long-time gardener from MT wrote (April 15, 2012):
Bought it especially for the protective clear dome. However: the directions say to keep away from the sun until seeds germinate. (Seeds are dropped into a hole in each sponge.) Now that I have some things coming up in my bio-dome, I realize that it is only possible to do that if all the seeds germinate at about the same time. The few plants that are up need sun, most others may be harmed by the sun. I wish now I had ordered the 18 cell, or 40 cell version, since the cells in the 60-cell version are scarcely an inch across at the top, which means the plants will need to be transplanted fairly soon., and I like to start seeds pretty early.
Great for starting vegetable seeds
from MT wrote (April 12, 2012):
Great shipping time, planted my tomato and squash seeds and the squash started sprouting in less than a week. I live in Montana, so this should be a great way to get a good start for the vegetable garden since I cannot plant in the ground until the end of May.
Great Customer Service
Sheila Jenkins from MA wrote (April 09, 2012):
Hello , just wanted to send a quick email to say Thank you for your very quick response to the problem with my order #6483087. The domes to my seed starter kits arrived cracked and broken. I called on Monday 4/2 to report the problem and had new replacement domes on Wed 4/4 I work in a customer service environment myself so when I receive excellent service I just like to always say Thank You ! Great job! I can't wait to plant my seeds with my kits and hopefully find out I really do have a green thumb :-) Thank you again for the excellent service.
DAVE from FL wrote (March 21, 2012):
The greatest Seed Starter ever!!!
Wendy from AR wrote (March 06, 2012):
OMG! These Bio Dome seed starters are wonderful! No more dealing with messy seed starting mixes. Plus, they are space saving. Every single one of my Parks Whopper tomato seeds germinated. Now, I have it filled with Coleus, and even those tiny little seeds have germinated perfectly. I liked my first Bio Dome system so much that I went back and ordered two more. I will never start seeds again any other way.
Amazing Product
Gayle White from wrote (February 22, 2012):
Your Bio-Domes are out of this world. Finally, I can germinate seeds that are healthy & grow. 98% of seeds are germinating & I think the 2% are real small seeds that I just didn't get into the sponge. The are so easy. Bio-Domes are AWESOME.

What are the differences between the various Bio Domes: 60-cell, 40-cell, and 18-cell?

The 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?

The 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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