Why choose Carrizo Citrange?
Technical analysis
It gives the tree strong vigor and good fruit quality. Its hardiness is very respectable, withstanding temperatures down to 5°F (−15°C). It is generally resistant to Phytophthora and Tristeza, which makes it a historic replacement for the bitter orange in modern orchards.
Point of caution
It is very sensitive to root asphyxiation in clay soil and to salinity. Its limestone tolerance is average (about 8%), which makes it less versatile than the FA5.
Quick comparison
More vigorous than the C35 (the tree takes up more volume).
Hardier than the bitter orange but less so than pure Poncirus.
More versatile than the Citrumelo for classic varieties.
Our conclusion
The Carrizo is the "Vigorous Classic." It is the ideal engine for a large, productive tree in healthy soil, but it lacks the adaptability of newer hybrids such as the FA5.