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- Griffith Buck Roses ...www.ag.iastate.edu/centers/cad/rose1.html
- Based on research in USDA Plant Hardiness Zone 4a, this report rates 196 rose cultivars and species for floran traits, bloom pattern, plant size and habit, disease and insect tolerance, and winter injury. Discusses factors affecting flowering ability, winter survival, and susceptibility to disease and insect and insect pests. Special section on cultivation discusses and make recommendations for ...extension.umn.edu/distribution/horticulture/DG6594.html