Container size & shape for raspberries
Hi! I'm grateful for the fantastic advice and information from the generous gardeners on this forum. Thanks so much for the information I've already gathered from the forum archives. Next week, I'm planning to mix up my first batch of 5:1:1 mix and (after the lime finishes reacting) buy and pot my first bababerries to go on the patio.
I'm planting in containers in part because of the potential invasiveness of the berries and in part because this house is a rental and I will likely want to take the berries with me if I move. This is in San Diego, Sunset zone 24.
Because of the effort involved in making the 5:1:1 mix, I would like to use the minimum needed for the berries to thrive, and enough to give me at least two years before repotting. I've attached a sketch of where the raspberry container will be placed. I hope to build a decorative rectangular container the width of the space (4.5 to 5 feet). So the question on container size is really one of depth and height. Is a 5'x1'x1' container reasonable? Or 5'x1'x2'?
Perhaps a better way of asking the question is: How many bababerry plants can thrive in 10 cu ft of 5:1:1 mix in a rectangular 5'x1'x2' container?
And while I'm planning the container, will raspberries grow better in round vs square containers? Does container shape affect their growth?