When growing raspberries in pots or in the ground, the ground wins for total yield every time. In-ground canes give you about 2 pounds (0.9 kg) per cane while potted plants top out near 1 pound (0.45 kg). That said, pots work fine if you pick a compact cultivar and use a big enough container for the roots to spread out.
I tried container raspberry growing with a Heritage cane in a 20-gallon (76 L) pot on my back deck two summers ago. It gave me just under a pound of fruit through fall, while my in-ground bed of the same cultivar pumped out twice that per cane. The pot worked, but I worked harder to get less fruit out of it.
The root habit explains why ground beds win for yield. Raspberry roots spread sideways across the top 2 feet (0.6 m) of soil. In the ground, they push out fresh canes from buds several feet away from the parent crown. A pot blocks that natural spread and limits the energy the plant can store for next year's fruit.
Pots also dry out fast in summer heat and can cook the roots when the sun hits a dark container all afternoon. Soil in a 15-gallon pot can swing from soaking wet to bone dry in 24 hours during a heatwave. That stress drops yields and shortens the life of the plant by half compared to a bed in the ground.
Raspberry pot size matters more than most rookie growers think. Use a container of at least 15 gallons (57 L) with multiple drainage holes at the bottom. Smaller pots stunt the canes within one season and you end up with thin, weak growth that snaps in wind.
In-Ground Beds
- Yield range: Mature canes give you 1.5 to 2 pounds (0.7-0.9 kg) of fruit per cane in a normal year.
- Lifespan: The crown lives 10 to 15 years and the patch widens on its own through underground suckers.
- Care load: You water deeply once a week and feed once in spring, then mostly leave the patch alone all season.
Container Plants
- Yield range: A potted cane gives you about 1 pound (0.45 kg) of fruit in a strong year with good care.
- Lifespan: Pots typically last 4 to 6 years before the root mass binds up and yields drop sharply.
- Care load: You water daily in summer heat and feed every 4 to 6 weeks to keep the cane fed and fruitful.
Best Pot Cultivars
- Raspberry Shortcake: Dwarf type that tops out at 2 to 3 feet (0.6-0.9 m) and needs no trellis or staking.
- Compact Heritage: Standard everbearing type works in 20-gallon (76 L) pots with a small stake for support.
- Bushel and Berry: A patio-bred line that fruits on first-year canes and fits small spaces with ease.
Pots make sense in a few real cases. If you rent a place and want to take your plants when you move, a pot works well. If your only sunny spot is a patio or balcony, a pot lets you grow fruit where you have no ground at all. Tight city yards with poor soil also push many of us toward container choices.
When you go with a pot, fill it with a quality potting mix blended with 30% compost for the right nutrients. Skip garden soil since it packs down hard and chokes roots in a tight container. Top the mix with 2 inches (5 cm) of bark mulch to slow water loss in summer.
Winter care is the biggest gotcha for growing raspberries in containers in cold zones. The roots in a pot freeze far faster than roots in the ground because cold air hits the pot from all sides. Move pots to an unheated garage or wrap them in burlap when temps drop below 20°F (-7°C). Skip this step and you may find dead canes come spring.
Pick the ground first if you have the room and the right site. Go with a big pot if your space forces the issue and you pick a compact cultivar built for that life. Either way, you can grow your own berries with care and a bit of know-how.
Read the full article: Raspberry Plants: Complete Growing Guide
