It has been previously established that cold acclimation increases freezing tolerance in Citrus. Because both salt and cold streeses are osmotic stresses, salt application may also increase freezing tolerance. Freezing tolerance of salt treated `Pineapple' orange (C. sinensis [L.] Osb.), large pink pummelo (C. grandis [L.] Osb.), and Pomeroy trifoliate orange (Poncirus trifoliata [L.] Raf.) seedlings is being examined. LT50s for each species under our freezing conditions were established by subjecting nonacclimated and cold acclimated plants to temperatures ranging from 0 to -19°. Seedlings were treated with various concentrations of NaCl (0, 40, 80, and 150 mM) under cold-acclimating and nonacclimating conditions for 2 months, then subjected to freeze stress and examined for ability to recover. In an initial trial, pummelo seedings treated with 40 and 80 mM salt under cold-acclimating conditions displayed an increase in freezing tolerance, while exposure to any level of salt decreased freezing tolerance of sweet orange and trifoliate orange seedlings.