Hoadley retired the same year and passed control of the company to four of his sons: Walter as managing director, Peter as Purchasing Officer, Albert as Marketing Officer and Charles as Chairman of Directors (although in reality this was a minor role due to his active personal life outside the family business).

Earliest records for interstate sales appeared in Western Australia in 1921, with advertisements for Violet Crumble by the Perth department store Boans in the lead-up to Christmas.

[4] During the 1940s sales and profits for the company continued to rise and in 1947 the Polly Waffle was launched, which went on to become Hoadley's second most popular product line behind the Violet Crumble.

[4][6][7] In the post-war years the company continued to operate under Hoadley's sons and more product lines were introduced to the market.

Later (possibly in or around 1962) Albert's son Gordon assumed the role of managing director and presided over the company until its takeover by Rowntree's in 1972.

[4] In 2018 Nestlé sold the rights to the Violet Crumble to South Australian confectioner Robern Menz.

The original theme was a pale purple colour featuring a wave-like sculptured lid and a gold ribbon embedded with violets on its upper left.

[18] In 1956 to promote their new Clancy Bar, Hoadley's Chocolates commissioned the reading of the Banjo Paterson poem Clancy of the Overflow (from which the chocolate bar was named) across a number of radio stations across the country (possibly in the evenings of Monday 20 to Wednesday 22 August).

After 62 years production Nestlé discontinued the Polly Waffle on 23 November 2009 citing poor sales.

[30] In 2014 Nestlé signed a deal that resulted in White Knight bars only being available from the major supermarkets Coles and Woolworths, along with a few small confectionery shops.

In 1988 Rowntree Hoadley temporarily ceased production after running out of sugar after a strike by CSR workers, and stood down around 700 members of its workforce.

The factory, which had already ceased operations and demolition work begun, was completely destroyed by the blaze, which was not extinguished until the following morning.