Citrumelo 4475 is a tetraploid cold-hardy dwarfing citrus rootstock, mainly used for sweet oranges and grapefruit. It produces a grafted tree with a mature height of around 4m.
Tetraploid citrus rootstocks are thought to be more tolerant of water stress and nutrient deficiencies than diploid citrus rootstocks.
These rootstocks are bio-certified, and raised from seed. The rootstocks are naturally thorny, but this does not affect the scion variety.
Prices are per rootstock, contact us for a discount for larger quantities. The 1-year plants are about 35cm.
Rootstocks are usually 8-10mm grade, the best size for grafting. Please order by January for delivery in February - March. If you wish to order a large number of rootstocks please contact us.
Contact us if you would like to go on the waiting list for next season.
Let me know when Citrumelo 4475 citrus rootstocks are back in stock.
If you do not hear from us by March you can contact us to pre-order for next autumn.
Citrumelo 4475 is a hybrid between the Citrus trifoliata (the Japanese bitter orange) and Citrus paradisi (grapefruit). It was originally developed by Walter Swingle in Florida in the early 20th century, and has become one of the most widely-planted grapefruit / orange hybrid rootstocks.
These rootstocks are suitable for grafting your own citrus trees, and impart some cold-hardiness to the tree.
If you are in an area where winter temperatures fall below freezing we strongly recommend that you plant citrus rootstocks in a sheltered location. Even though they are cold-hardy, it is important to protect them and help them to get established, especially in the first winter after transplanting.
