Here is Oca 'Dark pink', not yet at the sprawling stage, growing strongly between tomato 'OSU Blue', despite being subject to a medley of drought, high wind, downpours and hailstorms since planting out.
The bed's timetable in detail:-
13th April. Cleared the preceding green manure crop (grazing rye). Tops hoed off with an azada, and removed, roots left in situ. Not dug.
14th April. Beetroot (plugs, sown 15th March) were planted out.
The tiny plants are just visible in rows 9" from the bed edge (centre foreground bed)...
growing away in Root trainers at this point.
9th May. Oca and tomatoes finally get planted out. The Root trainer method seems like a success, and I'm sure this will give them a better start than using pots.
Cheltenham Greentop on the left, and 'White' on the right.
The tomato supports are on 16" spacing, with 24" between the staggered rows. Incidentally this assumes using the UK conventional cordon growing method (side-shooting, and deleafing lower part of stem). If you use the American cage method I'd go for much wider spacing.
5th June. Full ground cover from the Oca between the tomatoes, and beet down the edges (beetroot now being harvested).
Toad's Garden for the seed.
8th August. Tomatoes in full production.
4th December, tomatoes removed after the first light frost.
Tubers are swelling!
Harvest still to come!