Another 7,500 were to have been available in September, but half were already sold. Some 2,500 sold out in the first batch this spring.
However, Suttons' Gavin Shaw has managed to obtain a projected 37,000 plants so far as cuttings started to be taken around the world as soon as the prize was announced at Chelsea on Monday.
There are only six of the plants in Europe, with three at Chelsea, including one on the HTA/garden industry 40 Sunbury Rd exhibit.
Charlotte Russe is a compact (1.5m) mulberry that gives a lot of fruit on new wood and is described as an excellent fruit shrub for smaller gardens or the terrace.
Royalty manager and breeder representative Plantipp is the manager of this winner that was found by breeder Hajime Matsunaga from Japan and it is exclusively available at Suttons for a year.
Suttons says plants have "thrived through all four seasons in Devon and Yorkshire and it is reportedly fully hardy" although to be on the safe side Suttons still recommends protecting any tender new growth from hard frosts in its earliest years.
Suttons adds: "With the National Mulberry collections being held in the Royal Gardens and the plant being named after Princess Charlotte it feels appropriate for it to be launched by a company with a Royal warrant and shown at the Royal Horticulture Society show at Chelsea."
Clematis ‘Taiga’, also managed by Plantipp, was fourth in the competition and is bred by Shigeaki Ochiai.