Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots
Square Black Form Pots

Square Black Form Pots


$3.20 Sale price
  • In stock - departs in 2-3 business days
  • Inventory on the way

This product has a bulk discount available.

As part of Greenhouse Megastore's consistent goal of offering the best pricing and service possible, we are able to pass along savings by offering bulk discounts on select products. On these products we are able to offer larger amounts (like larger packs or cases) at a cheaper price-per-unit than individual items or smaller cases. If you have any questions, feel free to call 1-888-281-9337 and speak to a member of our team!

View all products with Bulk Discounts

Need to provide extra support to your new and growing seedlings? Our square plastic planting pots offer excellent surroundings for annuals, vegetable cuttings and other seedlings at low, affordable prices.

Used in conjunction with Black Form Trays, these economical vacuum-molded square nursery pots are designed with performance in mind. You also can add them to traditional 1020 trays and other flats to organize plants and prepare them for transplanting, so get yours today from Greenhouse Megastore.

Small black planters are available in a variety of configurations to meet different handling, labeling and bench space requirements. The 3.5-inch and 4.5-inch square nursery pots come in regular and "deep square" versions to accommodate seedlings with longer root systems. See below for the full dimensions and capacity of each square plant pot.

Square Black Form Pots are an effective method of bringing potted plants to market. Save money with our large cases of mini black planters for commercial and teaching greenhouses. We sell our square black form pots at wholesale prices, but you can save even more money by signing up for our newsletter below!

For pots, bags, planters and other garden supplies, we hope you'll shop with us here at Greenhouse Megastore.

Black Square Nursery Pot Features:

  • Made of vacuum-molded (i.e. thermoformed) polyethylene plastic
  • Bottom drainage holes
  • Eight configurations
  • For use with Greenhouse Megastore Black Form Trays


  • Carrying trays must be ordered separately. Please double-check the pot size and pack or case amount before purchase.
  • Avoid excessive heat. Do not store outside, especially in direct sunlight. Extreme temperatures may cause empty containers to deform.

Additional Information

Potting Guide (PDF)


Name Dimensions (in.) Capacity (cu. in.)
2.5" Square 2.5" L x 2.5" W x 3.5" H 15
3.25" Square 3.25" L x 3.25" W x 3.5" H 29
3.5" Square 3.5" L x 3.5" W x 3.5" H 32
3.5" Deep Square
3.5" L x 3.5" W x 5 H 42.25
4" Square 3.66" L x 3.66" W x 3.11" H 32.83
4.5" Square 4.25" L x 4.25" W x 3.75" H 50
4.5" Deep Square 4.25" L x 4.25" W x 4-7/8" H 65
5.5" Square 5.25" L x 5.25" W x 6 H 116

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Customer Reviews

Based on 142 reviews
AverageJo8777 (Marysville, US)
Deep Roots = Better Melon and Squash Seedlings

I bought the Square Black Form Pots 3.5" Deep Square pots to grow melon and squash seedlings for our spring plant sale because you're not supposed to disturb the roots of seedlings when transplanting to your garden. I wanted to give the seedlings a chance to develop strong roots before transplanting. These pots are great! They are not the sturdiest, but I can see that they could be reused with a good wash, to get another season or two of use from them. They fit the 1020 Extra Heavy Duty Trays fairly well, three rows across the width of the trays and don't topple over.

Martin Eader (Poolesville, US)

Great products!!! Would definitely order again.

Diane Bignell (Glendale Heights, US)

Fast service good quality for the price

L. (Medford, US)
Both 4.5" and 3.5" pots

4.5" deep seem to crack easily when filling for transplants. They are more roomy for roots and buys time if seedlings become too big too fast. Good size for plant sales too. I moved to 3.5" pots -more sturdy to cracking, but they are top heavy when moving trays to GH or to harden off. Maybe their holder is the answer, havent tried it. Both sizes clean up easily for reuse (if I get any back) The canning jars and seedling pots rarely get saved or returned of any size.

William Toby Pritchett Mr (Morton, US)

Good quality not best quality. Should be able to get many seasons out of them.

Steve Gehde (Fond du Lac, US)
Great Product

I have used these for several years and they work perfect. I reuse these with no issues. Saves time as I don't have to transplant.

L.M. (Killeen, US)
Luv these pots! Wish I had ordered MORE of them.

Recently ordered two sets of 18 of these 3.5" Deep Square Nursery pots (3.5" L x 3.5" W x 5 H) and the only problem with them is I wish I had ordered a lot MORE!
At 70, I'm not able to do many of the things I want to accomplish but try to help where and when I can by supporting a local non-profit that has built four free community gardens where everyone is welcome to "help as you can and take what you need".
Something I am able to do is to start a lot of plants (mostly tomatoes) for them. Transplanted 35 Red Snapper young tomato plants into these new 3.5" deep square pots yesterday and I am so impressed with their quality and sturdiness. They should last for several years.
Also bought a set of ten 1020 trays from Greenhouse Megastore and all of my new pots and trays have been lettered with my name using a silver Sharpie because I really, really want to get them back when after the tomatoes are transplanted into the gardens in early March (Central Texas, 8b/9a).
Thank you for providing such great quality products!

Lisa Smeltzer (Paso Robles, US)
3.5" Deep Square

I was doing a fundraiser for my church and had over 2000 plants for sale. I got these pots and ended up ordering more. They worked perfectly for our needs. Sturdy enough and uniform display. I would gladly order them again for our next fundraiser. One note.... Due to My lack of judgment, the empty pots warped in the sun. Do not store the empty pots in the sun! That being said these pots are a very good value.

Edward (Salt Lake City, US)

Usually go through a box or two with spring sales. Holds plants well. Drains well. Labels stick well (l use printed side labels). Comes free when planting.

Gail Thurman (Columbia, US)
The pots worked well for our purposes

We appreciated being able to buy the pots in bulk, and they have been of good quality. No complaints.