Park's Original Bio Dome Seed-Starting System

Park's Original Bio Dome Seed-Starting System

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4.2 (19)
Grow bigger and better-rooted seedlings faster
SKU v1802
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Description / Park's Original Bio Dome Seed-Starting System

If you're new to using the Bio Dome, let us sing the praises of this, our most POPULAR PRODUCT OF ALL TIME. Customers love it, and even experienced seed starters like us, who have been dropping marigold seeds into the soil since pre-school, have come to make the Bio Dome the ONLY SEED STARTING SYSTEM WE NEED. Here's why:

Climate Control: you can remove the clear vent as the plants grow, but at first, especially if you're starting seeds in late winter, it's a real boost of warmth and humidity. And the two adjustable vents at the top make sure that your plants get good air circulation at all times.

Incredible Rooting Medium: in each hole of the polystyrene planting tray is what we call a "bio sponge," a pre-formed plug of sterile medium with a hole already drilled in the top. The bio sponge is simply the best way we've ever found to reliably germinate and grow on seeds. We plant 1—ONLY ONE—seed in each bio sponge, even for difficult-to-germ varieties, and they nearly always sprout. (The only seeds you don't want to grow in the Bio Dome are those of root vegetables like carrots, beets, and radishes—they need more space to grow their tuber than the bio sponge allows.) In all our years, we've just never had results like this from any other seed-starting medium, and we've tried them all twice. The bio sponge offers the perfect blend of aeration and moisture to help seeds of all kinds grow and cuttings to root.

Bottom Watering: you water the base of this tray, NOT the bio sponges themselves. Put enough lukewarm water into the base so that the polystyrene tray floats. The bio sponges will wick up just the water they need. And as your plants grow, their roots will go down and out, instead of spiraling or fanning out near the surface as you often see with top-watered seedlings. It's impossible to over-water the Bio Dome.

Root Strength: These seedlings form LOTS of roots and grow them straight down and out, so that when it comes time to transplant the seedling, you can see roots sticking out all over the sides and bottom of the bio sponge.

Ease of Transplant: none of this business of transplanting the plug into a pot and then transplanting the plant out of the pot and into the soil. When you start your seeds in the Bio Dome, they can be transplanted straight into their final home. The bio sponge holds together, but the roots fan out easily beyond the sponge and into the garden or container soil.

Refills of the bio sponges and the polystyrene block are available so you can use your Bio Dome for years to come. Starting the Bio Dome is mess-free, easy, and so economical. Whether you want to start your entire garden indoors at winter's end or you just have to root your favorite geranium at season's end, rely on the Bio Dome. You'll be glad you did—we stake our good name on it.

Green base measures: 14 7/8'' long x 9 1/2'' wide x 2 1/4'' high
Clear top measures: 14 7/8'' long x 9 1/2'' wide x 4 1/2'' high

Product Details

Product Classification Collections
Characteristics Container, Easy Assembly, Indoor Growing, Seed Starting, Seedling Protection

Customer Reviews

Mixed review
Review by Nancy
Although I’m continuing to use the the greenhouse setup, I’ve discontinued using the starter plugs. They end up getting pulled out of the ground by critters easily when I transfer them to the garden. The plugs don’t seem to be breaking down. A year later they’re still sitting on top of my soil where they were pulled out.
Well built
Review by Well built
Seems to be quiet functional, waiting on seeds
Great Product
Review by Mary
I've been using this product for several years with very good results. There is no mess, and my seeds germinate quickly than with other systems I've tried. I wish the sponges were biodegradable. I hope this can be altered in the future because that is important to me, and it's why I gave it 4 stars instead of 5. The cost of the sponges isn't an issue for me because I would spend that much on seed starting mix, but that is messier.
I love these
Review by Delia Lopez
I'm a bit confused on the sun yellowing comment. I've had my original 60 ct for at least a decade. I have purchased more over the years and have had my "new" ones since 2016 or so. I don't use them for zucchini, cuc, corn or other easy to start stuff. I look for new varieties of tomato etc this years "Trust" is $5 for 5 seeds... I have a heat mat and fluorescent lights great germination. Plants grow stout and strong. I have used my clear covers over tomatoes in the garden for unexpected frosts. I have floated one with lettuce etc in my aquarium for a mini aquaponic set up. I can fill the reservoirs and be gone a week or more without my babies dying. I have put my tomatoes in the top of the aquarium, when I didn't get them planted out (where I have a drip system on a timer, serious garden addict here) before leaving on a trip for 3 weeks... Everything made it!
WOW!!!! I'm impressed!!!
Review by Daniel Coates
I bought my 40-cell biodome because of the height of the top, but feeling a little skeptical about the build-up of it. After all, it was just a place to start my seeds, right? Well, when I received my new biodome two days ago, was I ever surprised and impressed!!! The packaging was fantastic and my biodome arrived in perfect condition, as did the seeds I'd ordered along with it. I planted cosmos and poppies, thinking that I wouldn't see any sprouts for at least a week. Well, not even 48 hours after planting my seeds in my new biodome, I've got flowers sprouting in my kitchen! And, here in Northern Michigan just days before Christmas, that's saying something!!!!! I'm getting a grow lamp this week so I can grow my flowers indoors, and when other people are thinking about planting their seeds to set outdoors, I'll be enjoying blooming cosmos and poppies in my den, all thanks to this wonderful biodome! I just wish it came large enough to attach to my house so I could have a full-sized greenhouse!
Too much hype.
Review by Carmen Ortiz
Do the seed grow? Yes. But after years using the large cells, I kept finding that unless you break them apart (and risk damaging the roots) the large sponges will stay intact on the ground for years, long after the plants are compost. I have tried them with all kinds of vegetable from artichokes to zucchini and it's always the same. Why did I use them for years? The domes are a large investments (mostly because of the price of the sponges). Now, I roll some pieces of paper towel or newspaper, insert them in the holes and fill them with soil. The smaller sizes some times will break apart, but being that I'm into organics finding sponges intact makes me question exactly what they are made off.
So easy.
Review by Dale
This thing is working like a charm. So confident and easy. Will be ordering more sponges. Maybe another dome as well.
18 cell bio dome
Review by Uncle Dave
Bought three total so I could grow my own transplants and was very excited with my success. Grew tomatoes, chard, lettuce, onions(60 cell dome), and an assortment of herbs. My germination rate was unreal! Very easy to grow and very easy to transplant-strong and vigorous plants. Follow the directions and enjoy.
So easy - so neat and so clean!
Review by Sharon
Last night I planted seeds in my new bio dome seed starters! I just loved how easy and neat it was! No mess to clean up. Cut my work and prep time to a third! Very excited to order the planting medium to start seeds for fall crops since this is reusable!
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