keep Crocosmia and Schizostylus in pots

Emerion

I've got a Schizostylus coccinea ‘major’ and a small Crocosmia that are currently in a herbaceous border. The  Schizostylus has just started flowering, and the Crocosmia is slowing down. They need to be dug up and kept in pots for quite a while during garden restoration. Possibly for a year.  I'm looking for some advice about what kind of growing medium to use and how much room the rhizomes should have in the pots to give them the best chance of surviving. Also, should I cut them both back? I have a poly tunnel and could also give them protection outside from our strong winds in shade. Protection in sun is tricky, but if essential, I could make a sheltered enclosure from old polytunnel plastic. Thank you 

Borderline

People grow both in containers so I don't think you would need to worry too much about keeping in a container. Although I have not grown both in pots before I think both would not need masses of room like you would if you were to dig up a shrub/tree.

I would pot them in a loam-based compost mixed with one third multi-purpose compost. Can't say about size of pot, all depends on your clump size. But just a little bit larger than the clump will do. Make sure you line some drainage for the lower sections of pots. Stones, old polystyrene bits etc. Leave in the polytunnel or just outside on a south section. It's your choice but I would keep the foliage and deadhead. Let it die down naturally.

Buttercupdays

Schizostylus (Hesperantha) enjoy damp  soil. Mine are happy at the edge of a boggy border by a  little drainage ditch. When in a drier place before, they ran around under/between rocks and paving stones.

They are completely hardy, so don't need weather protection, but  might appreciate some shade for their roots from a stone or two.

Some Crocosmias are more sensitive than others, so check out your variety first, one of my yellow ones needs a more sheltered spot. The rest can cope with anything the winter thows at them, even last winter!

Emerion

Thanks both. That sounds easier than I thought.