Posted: 12/06/2013 at 10:38
Dotty, you generally get what you pay for with potting mix. It's worthwhile investing in top quality stuff. The cheaper ones can be rubbish. If the "trough" is as small as you seem to be suggesting that could explain why the mix is drying out so quickly.
Beefsteaks grow into big plants - 6' tall or more - with strong root systems. Put them into decent-sized pots with top quality mix. Given that they need to be staked, you'd need pots at least 35cm deep in order to give the stake sufficient mix to hold it up. Too shallow a pot and the stake won't be stable. A strong wind will blow the stake over, taking the plant with it.
Here are a couple of my beefsteak varieties in the ground. They've been in around 5 weeks and have a lot of growing to do yet.
The first BRANDYWINE OTV fruit:
And PINK GAETANO: