5-Gallon vs 1-Gallon Grow Pots: Which Size Does Your Plant Need?
Your plant's size is not decided by its seed packet alone. When plant scientists ran 3-D MRI scans of potted roots, they watched roots race to the pot walls within weeks. Then they reviewed 65 independent studies across species like tomato, corn, wheat, cotton, pine and cactus, and found that on average, doubling the pot size let plants grow 43% larger (Poorter et al., 2012, Functional Plant Biology). Plants in smaller pots grew more slowly because their photosynthesis rate dropped — the roots, in effect, size up the pot and tell the plant what it can afford to become. The lead researcher put it plainly: "After this study, I immediately changed the pot size for all the plants I had in my house."
The pot is not storage. It is a growth decision. And when the pot is breathable jute instead of rigid plastic, there is a second advantage: when roots reach the fabric wall, the air prunes the root tips instead of letting them circle around and strangle themselves. In a Texas A&M trial on shrub roses, fabric pots cut root deflection and circling roughly fivefold compared with conventional black plastic, and on a 41°C day the sun-facing root zone reached 55.0°C in black plastic versus only 36.4°C in fabric (Arnold & McDonald, 2006, Subtropical Plant Science). Cooler roots, air-pruned instead of circled — in pots you can plant straight into the ground at season's end.
So which size does your plant need? Here is the short answer, with the detail below:
| Product | Price | Best for |
|---|---|---|
| 1-Gallon Jute Grow Pots (5-Pack) | $33.75 CAD | Starting seeds, herbs and flowers; filling a windowsill or balcony in one go |
| 5-Gallon Jute Grow Pot | $28.13 CAD | One big hungry plant: tomatoes, peppers, shrubs |
The seed-starting workhorse: 1-Gallon Jute Grow Pots (5-Pack) — $33.75 CAD
Five one-gallon pots for less than the price of a bag of potting mix. Each measures 23 x 13 x 2 cm and weighs just 95 g. This is the set you reach for when you want many plants rather than one big one: a full herb collection, cut flowers, seedlings started indoors this fall for overwintering, or a head start on next spring. Sow, grow, and when the weather cooperates, plant the entire jute pot straight into the ground. The roots never have to leave home, so there is no transplant shock, and the jute simply biodegrades in the soil.
One plant's forever home: 5-Gallon Jute Grow Pot — $28.13 CAD (reg. $32)
This is the pot the 43% finding is talking about. A tomato or pepper in a five-gallon pot has the root volume to become the plant it was meant to be; the same seedling in a one-gallon pot quietly decides to stay small. At 33 x 7 x 2 cm and 155 g it is light enough to shuffle around the patio, yet deep enough for a serious root system. One pot, one hungry plant, one full season — and at season's end, pot and all can go straight into the garden bed.
How to choose
Ask yourself one question: am I growing many small things or one big thing? Many small things — herbs, lettuce, flowers, seedlings — want the 1-gallon 5-pack. One big thing — a tomato, a pepper, a patio shrub — wants the 5-gallon. Either way, the jute does the same job: breathable walls that air-prune roots, keep the root zone cooler than plastic, and compost themselves when the season is done.
A quick note while it lasts: through October 31, code FALL15 takes 15% off your entire order. That brings the 5-gallon pot to $23.91 and the 1-gallon 5-pack to $28.69.
Frequently asked questions
Will a bigger pot really make my plant that much bigger?
On average, yes. Across 65 independent studies, doubling the pot size meant plants grew 43% larger. The roots sense the restricted volume and the plant dials down its growth — mainly by slowing photosynthesis.
Can I plant the whole jute pot in the ground?
Yes. That is the point of jute. The pot biodegrades in the soil, the roots grow straight through it, and because the roots are never disturbed, there is no transplant shock.
I mostly grow herbs. Which size should I pick?
Most herbs are perfectly happy in a 1-gallon pot — the 5-pack is built for exactly that kind of collection. Save the 5-gallon for the heavy feeders: tomatoes, peppers, and anything you want to grow truly big.
Do fabric pots dry out faster than plastic?
In the Texas A&M trial, the fabric pots did not need extra watering compared with plastic. In practice the fabric breathes a little, so check with a finger and water when the top inch of soil is dry.
