Raspberry canes grow head height and taller so before planting you need to plan what plant support you will use. Have look on Google at the different methods people have used. I personally train ours along our fence.
Raspberries are best planted in spring when the weather is warmer. You can buy them bare rooted (this means they aren't in a pot and soil) or potted. If you buy bare rooted raspberries, make sure you soak them for 24 hours before planting.
If you have more than one raspberry cane to plant, I would recommend digging a trench and planting your raspberries in a row.
When planting, instead of just planting the pot and soil, loosen the soil and spread the raspberry roots out flat in a circle around the cane. They need potassium to fruit so popping a banana skin in the ground with the cane will decompose and feed them in a few months time. Push the dirt back in firmly around the cane.
Canes should be spaced about 45cm apart. This is because they will shoot more canes as they mature. Trim the cane back to 20cm after planting to encourage growth.
Raspberries can grow in a pot. As always I recommend self watering pots and water crystals. Ensure you pot is about 40cm wide to allow enough space and don't forget plant support.
Raspberries either fruit on canes which are a year old (summer fruiting) or on canes which are new this year (autumn fruiting). It's best to plant both varieties so that you have a longer crop.
Pruning is dependant on varieties.
Summer pruning varieties should be pruned immediately after fruiting. Cut the canes that fruit down to the ground immediately after it has finished fruiting. This is because summer varieties fruit on canes which are one year old so those canes which have fruited will not fruit again. This allows them time to put their energy into growing new growth which will be one year old and fruiting canes next summer.
Autumn fruiting varieties can be pruned during winter because they fruit on new growth that sprouts in spring. Cut the canes which have fruited down to the ground.
Raspberries need phosphorus to flower so pour worm tea, bokashi juice or seaweed solution onto them in spring. Once they have flowered they will need potassium so pour banana skin water onto them.
Harvest when they have turned red all over. They will come away from the white plug easily if ripe.
Onions, garlic, leeks and chives are a natural insecticide. Coriander deters ants from the fruit.
Raspberries are not appropriate for succession planting. However as mentioned there are summer and autumn fruiting varieties and owning both will extend your season.