No experience on pots but I have been growing cucs in an earthbox the last 2 years and just finished planting one for this year with very good results. I set the box diagonal across the corner railings of my rear deck and just let the vines sprawl downward. I see no reason you couldn't do it with a large pot. Also I use MG potting mix in my EBs and pots.

Manofsteel,what is your cuke variety? This is my first time to grow in pots and I've started spacemaster bush as recommended on several websites. But sounds like you used a vining variety. What was your plant spacing?

Veggievicki,

I grew 4 vining cukes in a Gardener supply self watering container last year with fairly good results. The yield was productive, but after a week of clouds, rain and drizzle they got hit hard by powdery mildew. The container held 2 cubic feet of mix so I suppose you could say they had 1/2 cu ft each although there was nothing stopping the roots from growing into each other.

Varieties grown were Diva, County Fair, Lemon and one other that escapes me at the moment.

The mix was 2 parts conifer bark fines, 1 part Turface MVP and 1 part peat. It's not a 'super mix' or anything like that, just offered a bit more aeration than a peat heavy mix does. You should be fine with the mix you have this year, it's just not a great idea to reuse peat heavy mixes in subsequent years as the peat breaks down into smaller and smaller pieces squeezing out the air spaces so important to optimal growth.

I think I grew 5 Marketmore 76 on one side and 5 Sumter on the other, evenly spaced out across the box. That's quite a bit more than it says to plant in an earthbox but they produced very well for about 3 weeks and then the summer heat pretty much shut them down.