Director Lee Wrigley said despite industry rumours, key staff at the garden centre supplier remained in place.
He added that after trading through administration, which began on 6 April, the Wrigley family had bought back the business on 10 August.
The Lancashire-based grower will now be a new company called Whiterigg Alpines UK.
Among Whiterigg's 550 garden centre customers remain Wyevale, Tillington, Dobbies, Klondyke, Squire's and Hillier.
Whiterigg supplies six million plants a year from two sites and employs 40 staff. Two sales representatives have moved on. Face-to-face contact will now be with merchandisers.
Wrigley added: "I'd like to thank customers for their support. We never stopped supplying, although stock was thin on the ground, but we're potting like crazy now."
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