Hostas are large-leaved, decorative shade to part-shade plants. They are semi-hardy and will die back in the late fall and re-emerge in spring. There are numerous cultivars of every shape and size, with a variety of flower colours. Hostas can be moved indoors, if there is a danger of a severe winter, to preserve the rhizomes and roots. Hostas do well in pots and can provide excellent screening due to the huge leaves. The pots need to have good drainage and be filled with rich organic soil.
Dig up your hosta by shovelling a couple of inches around the plant. Dig deeply and pop out the hosta, taking care not to disturb the roots or rhizomes. There will be several rhizomes attached to the plant. Shake off the dirt and set the plant aside.
Ensure that your pot has good drainage holes. Fill it 3/4 of the way with potting mix, or to the depth of the hosta's roots when it is placed level with the rim of the pot. Put slow-release fertiliser on top of the potting soil and mix in. Place the hosta in the pot with the leaves above the rim and base just near the rim. Fill with potting soil.
Water your potted hosta well. The extra water should run freely out of the drainage holes. Top dress the soil around the plant with compost or manure. This will further feed the plant and helps keep moisture inside the pot.
Water frequently in summer to keep the soil moist but not saturated. As fall arrives the watering can be less frequent. The leaves will probably die back and will need to be cleaned away. The pot can remain where it is if there are no freezing temperatures expected. In cold climates potted hostas will need to be moved indoors to preserve the rhizomes.