The general goal of this project is to rapidly propagate complex citrus rootstock material for field testing. The rootstock materials to be tested will be products of the Citrus Improvement Program at the UF-IFAS-CREC in Lake Alfred. Specifically, these materials will be selected based upon their performance in the �HLB gauntlet�: Promising rootstock genotypes will have already been evaluated in the greenhouse and field for their ability to grow-off citrus scions that have been exposed to CLas-positive budwood and CLas-positive Asian citrus psyllids. Once candidate rootstock materials have successfully passed through this gauntlet, they will be propagated via rooted cuttings en masse in a psyllid-free greenhouse at the UF-IFAS-IRREC in Fort Pierce. From there, rootstock materials will be budded with scion materials and planted in the field for further testing for their long-term performance. Cuttings from the following ‘gauntlet’ rootstocks were treated with rooting hormone and place on the mistbed for rooting: 1. A+HBPxCH+50-7-12-14 2. 46×31-00-S10x46x31-00-S11-S5 (salt tolerant sour orange-type) 3. Orange 10 x Green 7-11-1 4. A+VolkxOrange19-11-5 5. A+HBJL2BxOrange14-09-7 6. A+HBJL2BxOrange19-09-31 7. A+HBJL1-09-14 8. A+FDxOrange19-11-11 Seedlings were grown from four promising sour orange-like rootstock candidates with promise for adaptation to IR soils, with a goal of providing a quick source of material for cuttings as follows: 1. 46×20-04-S22 2. 46×20-04-42 3. 46×20-04-48 4. 46×20-04-S13