Posted: 06/01/2016 at 20:21
At last - found this on J Parkers website. All clear now. Thanks for help.
1st Grade Loose Root Plants
Top graded plants, although different varieties produce different sized root systems. Grown for at least a year in a nursery field and then lifted in the autumn when dormant. These deciduous plants are mature and cold stored right up until we despatch them. Plant these plants straight into your pots or borders as soon as you receive them. Water them on planting and they will establish over the winter and burst into life in spring. They are carefully packed and delivered to you in a parcel along with other hardy plants and bulbs you may have ordered.