The plants that Jerome at Koi Gardens sells are healthy plants in small pots that usually arrive potbound. That is not an issue though--just tease the roots apart as best you can, pot them up in one gallon sized pots, and grow them out until this fall, pinching back as the plant grows. Make sure you plant the plants deeper in the one gallon sized pots than they were in their original pots. This buries dormant nodes that can generate more stems from below ground level. This fall they will be huge one gallon sized plants that you would pay significantly more than $6 for anywhere you could find. Fall planting is far better than spring planting since we can go from spring to summer in no short time and the roots won't have as much time to acclimate. The cooler temps in the fall will allow the roots to get settled in well before winter arrives, and even into winter if the soil is well mulched, and next year the plants will take off like gangbusters.

Thanks for the heads up. I shouldn't have but placed an order as they have a lot of the small flowered clematis that are scramblers rather than climbers - just the type I like the best.