The Best Raised Bed for Potatoes

For most gardens the best container for potatoes is a potato grow bag with a harvest flap -- around 10 gallons, with a side access window so you can take early potatoes without tipping the whole thing out. If you want a real bed instead, go deep: a 24 inch steel bed or a tall standing-height bed gives you room to hill, which is what actually increases the yield. A standard 12 inch bed grows potatoes, just fewer of them.

Potatoes form on stolons above the seed potato, not below it. That is why hilling works: every time you pull soil up around the stem you create more of the dark, cool zone where new tubers can form. Depth in a potato container is not root space -- it is hilling room.

Which means the arithmetic is simple. Plant the seed potato about 4 inches above the base, then you need another 8 to 12 inches of free space above it to hill into as the plant grows. Anything under about 14 inches total leaves you no room to do the thing that increases the crop.

Quick picks

#	Product	Best for	Score	Price
1	Top pickPotato Grow Bags with Harvest Flap10 gal with a side access window	Potatoes and sweet potatoes	7.9★★★★★	Check price on Amazon
2	Smart Pot Round Raised Bed, 100 Gallon50 in across, 12 in deep, about 13.5 sq ft	A whole bed's worth	8.8★★★★★	$69.95 - View on Amazon
3	Birdies Tall Metal Raised Garden BedAbout 30 in tall, Aluzinc steel	Standing-height gardening	8.7★★★★★	Check price on Amazon
4	Anleolife 8 x 4 ft Metal Raised Garden BedUp to 24 in deep, 22-gauge corrugated steel	Deep beds for root crops	8.8★★★★★	$148.85 - View on Amazon

#ad We may earn a commission - Price as of October 10, 2026

Scores are our own editorial judgment, formed from published specifications and independent sources. They are not aggregated customer ratings, and they are not the result of hands-on testing, which we do not currently do. See how we choose.

Overcrowding is the standard first-year mistake with bags. Three seed potatoes in a 10 gallon bag gives a good crop of small earlies; six gives a disappointing crop of very small ones. The bag does not get bigger.

Harvesting potatoes means going through the entire volume of the container with your hands, because any tuber you miss is next year's volunteer -- and volunteer potatoes carry disease forward into whatever you plant next in that bed.

In a bag you tip it out onto a tarp, pick through it and refill. That is fine, and it is far easier than digging a bed. A side flap lets you do something better still: reach in mid-season and take a few new potatoes while leaving the plant growing, which is most of the point of growing your own earlies.

In a bed you are digging, carefully, through soil you have otherwise spent three years building structure in. Doable, but it is a real argument for keeping potatoes out of your main vegetable bed -- see the best grow bags for vegetables for the full case.

Potatoes are susceptible to soil-borne problems that build up where they grow repeatedly, and extension guidance is consistent: do not plant potatoes in the same ground in consecutive years, and keep them away from tomatoes, peppers and eggplants, which share the same diseases.

In a two-bed garden that rotation is hard. Bags solve it completely -- fresh mix every year, nothing carried forward, and you can put them on a path or a driveway where there is no bed to rotate at all. That is the strongest practical argument for growing potatoes in bags rather than in your best bed.

• Use a loose, free-draining mix. Potatoes in dense, waterlogged soil produce scabby, misshapen tubers. A standard raised bed mix is fine; heavy garden soil is not.
• Do not add fresh manure. It encourages scab. Finished compost is what you want -- see the best compost for raised beds.
• Keep watering even. Alternating dry and wet causes cracked and hollow tubers, and bags dry out fast in summer.
• Stop feeding nitrogen once flowering starts. More nitrogen late means more leaf and fewer tubers.
• Keep developing tubers covered. Potatoes exposed to light go green, which makes them inedible. That is the other reason to keep hilling.

1. 1

   Fill a third of the way

   Put 4 to 6 inches of loose mix in the bottom of the bag or bed, and no more. The empty space above it is the whole point.

2. 2

   Plant the seed potatoes

   Chitted side up, spaced as the table above, covered with about 3 inches of mix. Water in.

3. 3

   Hill when the shoots are 6 to 8 inches tall

   Add mix around the stems so only the top few inches of foliage show. The buried stem is where the next tubers form.

4. 4

   Hill again two or three weeks later

   Repeat until the container is full. Two or three rounds is normal; stop when you run out of room.

5. 5

   Keep every tuber covered

   Any potato exposed to light turns green and is inedible. Top up if the surface settles or washes down.

6. 6

   Harvest by the foliage

   Earlies once the plants flower; maincrop once the tops yellow and die back. Tip the bag out onto a tarp and pick through all of it.

Choose bags if you have a small garden, you want to rotate without planning, you would rather not dig, or you want to grow potatoes on a patio with no bed at all. They are cheap, they work, and they are genuinely the better tool for this one crop.

Choose a deep bed if you are growing enough maincrop to store, you already have the bed, and you have somewhere else to put tomatoes next season. A 24 inch steel bed grows a serious quantity of potatoes and the depth is useful for carrots and parsnips in the years between.

A standing-height bed is the third answer, for anyone who finds harvesting at ground level the problem rather than the digging. Elevated raised beds covers that choice, and raised beds vs grow bags sets the two side by side.