It is susceptible to citrus nematode and citrus tristeza virus. the sour orange rootstock trees. Parentage: Sour orange. More trials are required for the use of Eureka lemon trees on Troyer citrange. Trifoliata orange (also called sour orange) is often used as the rootstock. Notes and observations: 2/24/1988, EMN: Six seedling budlines fruited at Lindcove, all appeared identical. Therefore the present study was designed to investigate the Viability of Meyer lemon over sour orange rootstock, Seeds per fruit: 4-12. Season of ripeness at Riverside: January to March . Your trees may ship the following week to avoid being in transit over the weekend. Sour orange is an orange but, as its name suggests, the fruit is extremely sour. The point where the graft was made (called the graft union) will generally appear as a swollen point or crook in the lower part of a trunk. It is probably a cross between the pomelo, Citrus maxima, and the mandarin orange, Citrus reticulata. Size when shipped: 26-30” We ship all orders the same business day if placed before 12:00pm EST. Rootstocks of accession: Carrizo citrange, C-35 citrange . Sour orange rootstock is more favorable than other citrus rootstocks due to its resistance to gummosis, high flexibility to wide range of soil conditions, and the ability to produce high quality fruits. It is somewhat tolerant to salinity, alkalinity and less than optimal drainage, and is relatively tolerant to cold, cotton root rot and Phytophthora. Fruit is a typical sour orange. Bitter orange, Seville orange, sour orange, bigarade orange, or marmalade orange is the citrus tree Citrus × aurantium and its fruit. We ship trees Mon-Thu so that they arrive prior to the weekend. The Troyer citrange is worthy of limited use as a rootstock for Lisbon lemon. Mature height - Dwarf: 8-10 ft. Hybrids to recreate a sour orange-type rootstock without the CTV-sensitivity of the standard sour orange have been produced and are being compared sequentially, to identify the one or several that combine the best traits of sour orange with full resistance or tolerance to CTV. Sour orange trees can still be found in Everglades hammocks on the sites of former Indian dwellings. It is native to Southeast Asia and has been spread by humans to many parts of the world. Sour orange is the standard rootstock in Texas, being generally well adapted to the different citrus soils in the Valley. History. Mature height - Full Size: 10-15 ft. Harvest season: Jan-Mar. The term "Seville orange" is considered a synonym for "Sour orange", not a variety therof. This combination should be used in a limited way for trees to be planted on old citrus orchard land. When you purchase a young citrus tree, look for and find the graft union.