Mr. "Jack" Holt has lived in the Frankston district of Victoria all his life. He and his late wife Dorothy, were keen competitors in shows of the Geranium & Pelargonium Societies in Victoria.
Jack also competed in shows in New South Wales, and very successfully. Among the many prizes and trophies he has won is the 'George Spalding Memorial Trophy' which was awarded to him by the Australian Geranium Society Inc. in 1981 for the most distinct new introduction of that year.
Following the loss of his wife, Jack continues to maintain his active interest, not only with growing beautiful plants but working hard as a member of the Pelargonium & Geranium Society of Southern Victoria.
Our Research Committee was supplied with the following list of cultivars by Jack and includes some very lovely varieties.
| Powder Puff | Very double coral-pink flowers, tightly clustered. |
| Creme d'Lite | D. pale pink flower, medium green leaf with darker green broad zone. Cream with touches of salmon pink as it ages, medium green leaf with darker zone. Lovely pale creamy pink |
Powder Puff  | D. pink flower, dark green leaf with prominent black zone. |
| Amanda Rawlings | S. red, medium green leaf with bronze zone and light green centre. Red flowers, medium green leaf with bronze and light green centre. |
| Candy Comet | S. white with shades of pink flower, medium green leaf. |
| Gold Star | S. scarlet, yellow-green leaf with bronze zone. Single bright scarlet flowers. Bright gold leaf, no zone markings. Compact dwarf. |
| Evening Star | S. pale pink, yellow green leaf with brown zone. |
| Dorothy Holt | red with mauve centre. |
| Purple Clouds | purple, black blotch, white reverse. Pale purple with black blotches in upper petals, white reverse. |
| Purple Splendour | purple, black blotch. Lower petals pale purple white throat heavily veined and blotched with deep purple, upper petals almost entirely blotched deep beetroot purple. |