PROTEAS AND RELATIVES: PROPAGATION AND OBSERVATIONS
Seeds, Cuttings and GraftsBy Robbie Thomas
Introduction
Over the last seventeen years of my retirement, I have become increasingly interested in the propagation of Proteaceae. My aim is to find ways to propagate rare proteas as well as other members of the family and record the findings so the plants and the methods of propagating them will not be lost to future generations.
These observations have been made in my small experimental nursery in the Western Cape, South Africa in the coastal village of Bettys Bay some 100 kilometres SE from Cape Town.
A big thanks to Professor Braam van Wyk who suggested I should write up my findings and kindly made many corrections. I do not sell plants as this is my hobby and I donate plants to friends and gardens.
The Botanical Education Trust has funded this and further research and to them, a grateful thanks as my infrastructure and consumables were in a sorry state. Also thanks for all the help I have received from professionals, some of my early questions must have seemed like another sort of botanical pathogen visiting them. Thanks also to the sometimes significant tiny bits of information gleaned from conversations with non-professionals and importantly their questions helped formulate accurate responses.
Family support has been invaluable, my daughter and husband are rehabilitating and restoring degraded riverine areas and there is endless cross-ventilation there. My wife Vicki is a noted botanical artist and has painted many of my horticultural efforts and helped with the editing and drawings. My late mother was an apprentice horticulturist at Kirstenbosch starting at eighteen years old and was immersed there for the rest of her life – something rubbed off on me even though I went surfing and fishing for a while.
Propogation Methods
Protea seeds
Collecting seed from plants in the wild requires permission as indigenous plants are protected by law. Removing seed heads from a plant should be done with secateurs as snapping them off allows a greater opportunity for pathogen entry into the plant. No more than 10%...
Propagation by cutting
Cuttings are the clonal multiplication of the mother plant, thus it is important to choose the strongest stems from the strongest mother plant that is free of pathogens as the best as well as the worst is replicated. Cuttings taken from mother stock that are of third...
Reasons for grafting
Soil types vary considerably and Proteaceae are fine-tuned for their particular soil type while a hybrid rootstock generally has a wider tolerance. Compared to the scion, the rootstock may also have a resistance to nematodes, certain pathogens, drought, high or low...