SW Florida Sweet Orange Rootstock Planting

Dr. Jude Grosser – Dr. Fred Gmitter – Dr. Bill Castle
November 24, 2020 - updated
December 7, 2018 - posted
CREC Citrus Plant Improvement

SW Florida Sweet Orange Rootstock Planting – Description

This trial planted in a southwest Florida flatwoods site consists of 36 sweet orange/rootstock combinations (approximately 2800 trees planted in 2014). The scions are: ‘Valencia’ B9-65, OLL-8 and OLL-20 sweet oranges on 7 new sour orange-like hybrid rootstock candidates along with UFR-4, UFR-15, UFR-17 and White 1. The trial is not replicated, rather, combinations are planted in solid blocks. The trial was heavily impacted by Irma, with some flooding. The goal is to identify successful scion/rootstock combinations for southwest Florida flatwoods.

• Location: Immokalee, Collier county.
• Scion: ‘Valencia’ B9-65, OLL-8 and OLL-20 sweet oranges
• Rootstocks:  7 new sour orange-like hybrid rootstocks and UFR-2, UFR-4, UFR-15, UFR-17 and White 1 rootstocks 
• Date planted: 2014
• Data:
  • 2017/18: Yield; HLB rating; tree size rating.
  • 2018/19: HLB rating and tree size rating
• Trial status: ACTIVE