Skip to main content
UF Institute of Food and Agricultural Sciences logo
Give      University of Florida
Resources
    Toggle Search Form
    GIVE UNIVERSITY OF FLORIDA
    • HOME
    • Production Systems
          • Citrus Under Protective Screen
          • Individual Protective Covers
          • Irrigation and Nutrition
          • Particle Films
          • Plant Growth Regulators
          • Soil Health
          • Trunk Injections
          • Weather
    • Pest Management
            • Diseases and Pests
            • Diseases
            • Insects
            • Weeds
    • Food Systems
          • Food Systems
          • Flavor
          • Juice Processing
          • Postharvest
          • Produce Safety
    • Cultivars
          • Varieties
          • Rootstocks
          • Biotechnology
    • Economics
          • Economics
          • Regional Production Costs
          • Custom Rate Charges
          • Reset Costs
          • Harvesting Charges
          • Packing Charges
    • Resources
            • Resources
            • Archives 
            • CEU Opportunities
            • Citrus Nursery Production Guide
            • EDIS
            • Florida Citrus Production Guide 
            • Grower Tools 
            • Nutrition of Florida Citrus Trees
            • Presentations
            • Research Summaries
            • UF/IFAS Citrus Team Newsletter
            • Tip of the Week
            • Trade Journals 
            • UF/IFAS Citrus Magazine
            • Videos & Podcasts


    • Contact Us
          • Contact Us
          • Faculty
          • Research Centers
          • Feedback
          • Citrus Agents
          • Media Inquiries

    Statewide Citrus Research and Extension

    Statewide Citrus Research and Extension

    N11-7 Crimson Queen fruit

    UF N40-16-11-7

    Type

    Grapefruit

    Origin

    Developed by Jude W. Grosser (UF/IFAS)

    Primary Market Use

    Fresh                                       

    Season

    Standard

    Recommended Production System

    Conventional and Citrus Under Protective Screen (CUPS)

    Size and Shape

    Small to large grapefruit

    Color

    • External Color: Yellow
    • Internal Color: Reddish

    Flavor

    Grapefruit

    Brix/Acid

    • Similar to Ray Ruby

    General Information

    Appears to have better HLB tolerance compared to Ray Ruby and Star Ruby.

    University of Florida Logo
    Contact

    Feedback
    Citrus Research
    P.O. Box 110180 Gainesville, FL 32611-0180
    (352) 392-1971

    Land Grant Mission
    • Teaching
    • Research
    • Extension
    Information
    • Ask IFAS (EDIS)
    • UF/IFAS Experts
    • UF/IFAS Blogs
    • UF/IFAS Bookstore
    Policy
    • Accessible UF
    • EEO Statement
    • IFAS Web Policy
    • SSN & UF Privacy
    • Analytics (Google Privacy)

    © 2025 University of Florida, IFAS Last Modified:Wed, 1 Jul 2026 07:34:20 EDT