For the Mini Hostas they require additional care if pot growing then use a John Innes based compost No3 mixed 50:50 compost:horticultural grit make sure not to use too big a container when re potting your "minis". You can plant more than one hosta in an apline trough allowing at least 4-5 inches between each plant depending on growth rate of hostas chosen. If in doubt please feel free to email me for advice.