A “25-gallon” nursery pot measures about 24 inches across the top and 18 inches tall, but the actual liquid volume usually runs between 25.1 and 27.6 gallons because the industry uses “trade gallons” for dry soil volume, not precise liquid gallons.
If you’ve bought a tree and saw “#25” on the side of a black plastic pot, you’re not imagining the confusion. Trade sizes measure dry, uncompacted soil mix. The real volume varies by manufacturer, and knowing the difference keeps you from ordering a pot that’s too small — or too heavy to move. Here’s what the numbers actually mean, plus the exact dimensions of the most common models.
Why a “25-Gallon” Pot Isn’t Exactly 25 Gallons
The nursery standard uses trade gallons, which measure the volume of loose, uncompacted potting mix. A “5-gallon” nursery pot holds about 4.3 actual gallons of liquid when the soil is tamped down. The same principle scales up. The label is a size code, not a precise measurement.
Dimensions of the Most Common 25-Gallon Pots
| Brand / Model | Top Diameter | Height | Actual Volume |
|---|---|---|---|
| BetterGrow Hydro (Premium) | 25 in | 18.8 in | 25 gal (trade) |
| Everglades Farm (Classic Line) | 23.75 in | 18.125 in | 27.17 gal |
| Haviland (Trade 25) | 24 in | 18 in | 27.5 gal |
| Haviland (2500 Series) | 24.5 in | 18.25 in | 25 gal (trade) |
| Viagrow (Round) | 24 in | 18 in | 25.14 gal |
| Sooner Plant Farm (#25) | 22 in (width) | 19 in | 27.6 gal |
| Landscape Plant Source | 22 in (width) | 17.25 in | ~250 lbs filled |
What Fits in a Pot This Size?
A 25-gallon container is built for large trees and shrubs that have been growing long enough to develop a dense root ball — think mature crape myrtles, Japanese maples, evergreen hollies, or small fruit trees. These are specimen-sized plants, not something you’d find on a flatbed truck for shipping. The pot alone weighs about 6.5 pounds empty; filled with damp soil and a tree, it hits roughly 250 pounds. That’s a two-person lift or a hand-truck job.
Key Differences Between Popular Models
Not all #25 pots are interchangeable. The biggest surprise is that Haviland’s and Everglades Farm’s versions actually hold 27.5 and 27.17 gallons of liquid — nearly 10 percent more than the label suggests. Sooner Plant Farm’s model is narrower at 22 inches across but taller at 19 inches. Viagrow’s round pot sticks closest to the nominal 25-gallon mark at 25.14 actual gallons.
If you’re comparing pots for a specific saucer, drip tray, or raised planter, check the top diameter of the exact model you’re buying rather than relying on the “25” stamp. For a full comparison of the best models on the market, our roundup of the top 25-gallon nursery pots breaks down which hold the most soil and which are easiest to move.
Haviland’s 2500 Series pots include a scalloped top ring. That ridge isn’t decorative — it prevents the rim from bending under the weight of the trunk and protects the bark from rubbing. If you’re planting a tree that will stay in the container for a season before going in the ground, seek out a model with that reinforcement.
Common Mistakes People Make With These Pots
Assuming the volume is exact.
You’ll get between 25.1 and 27.6 gallons, not a perfectly measured 25. If you’re mixing liquid fertilizer by the gallon, work from the actual volume listed on the product page, not the trade number.
Underestimating the weight.
A filled 25-gallon pot weighs about 250 pounds. Plan the location before you fill it — dragging a loaded pot across a lawn takes two or more people, and it will leave ruts.
Thinking you can ship it.
Most nurseries classify #25 containers as pickup-only. They’re too tall, too wide, and too heavy for standard parcel carriers. If you’re buying online, expect a freight quote or a local nursery pickup option.
How to Convert Trade Gallons to Real Gallons
The safest move is to read the spec sheet for the specific pot you’re buying and use the actual gallons number if it’s listed.
FAQs
Can I use a 25-gallon pot for a raised bed?
Yes, but you’ll need more than one. A single 25-gallon pot only covers about 3.3 square feet of surface area. For a proper raised bed, you’d be better off with a dedicated rectangular planter rather than trying to arrange several round nursery pots.
How much soil do I need to fill one?
Roughly 3.5 cubic feet of potting mix fills a 25-gallon trade pot. That’s about two and a half standard 1.5-cubic-foot bags from the garden center. Buy a third bag to account for settling after watering.
Are 25-gallon pots reusable?
Yes, these black nursery pots hold up for multiple seasons. They’re UV-stabilized but will become brittle after three to five years of direct sun. Wash them with a dilute bleach solution between plantings to prevent disease carryover.
What size tree fits a 25-gallon pot?
Typically a tree with a trunk caliper of 1.5 to 2 inches and a height of 6 to 10 feet, depending on species. It’s the standard size for a tree that’s been growing in the nursery for two to three growing seasons.
References & Sources
- BetterGrow Hydro. “Premium Nursery Pot — 25 Gallon.” Official dimensions and trade volume for the premium model.
- Haviland via AMLEO. “25-Gallon Container (24″ x 18″).” Actual tested volume of 27.5 gallons and scalloped top ring details.
- Home Depot / Viagrow. “Viagrow 25 Gal. Plastic Round Nursery Pots.” Listed dimensions, actual volume of 25.14 gallons, and 5-pack pricing.
- Sooner Plant Farm. “Pot Size Details.” Eco-gallon definition, 27.6 actual gallons, and shipping restriction note.
- Landscape Plant Source. “Size Guide.” Weight reference (250 lbs filled) and 24-inch box equivalent.