Growers can choose two kinds of raspberry plants -- ever-bearing and summer-bearing. Ever-bearing raspberries continue to produce fruit throughout the growing season; summer-bearing raspberries produce fruit once per growing season. Planting raspberries in pots will ensure a fruitful and thriving plant when garden space is limited. No matter which type or variety of raspberry plant you choose to grow in your pot, you can produce a bounty of fruit if the potted raspberry is given proper nutrients and growing conditions.
Prepare the soil for the raspberry pot. Raspberries like slightly acidic soil with a pH ranging from 5.6 to 6.2. Check the bottom of the pot to ensure it has drainage holes. An ideal pot size for growing raspberries is 32 cm in diameter. A plastic 20 litre bucket works well for growing one raspberry plant.
Pour a 5 cm layer of broken pottery or gravel into the pot and fill it halfway with bagged potting soil. Use organic potting soil if it's within your budget. Add enough compost to fill the pot to the top, leaving a 2.5 cm space at the rim, and mix together with a garden spade. Compost made of peat moss or aged manure incorporates plenty of the organic nutrients loved by raspberry plants.
Sprinkle a balanced, slow-release fertiliser into the soil and incorporate it throughout the soil with the garden spade. Use the directions that come with the fertiliser as a guide in terms of how much to add.
Moisten the soil to achieve a slightly damp consistency. Create a well in the middle of the pot that is deep enough to contain the root ball of the raspberry plant.
Insert a 1 metre trellis into the pot. Position the trellis at the back of the pot so the raspberry plant will have adequate support when maturing.
Unwrap the packaging and place the raspberry into the planting hole. Cover the raspberry root ball and push down the soil to secure the plant.
Water the raspberry plant and set the pot in full sun. Cover the soil with 10 cm of pine needles to improve its water retention. Placing the raspberry plant in full sun will improve fruit bearing.
Prune the dead or diseased raspberry canes during the summer growing season, using pruning shears. During the winter months, prune off grey raspberry canes that produced fruit the previous season.
Fertilise the potted raspberry plant once at the beginning of spring, using the balanced fertiliser.
Set up your raspberry pots in early spring when all danger of frost is gone.