Hydrangea Cultivar HP219902 Autumn Color Stability
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Solution Overview
Problem
Current Hydrangea paniculata cultivars lack compact and freely-branching varieties with strong stems, large inflorescences, and attractive sterile flower colors that maintain color through autumn, and exhibit variability under different environmental conditions.
Innovation Solution
A new cultivar, 'HP219902', resulting from a cross-pollination between proprietary selections of Hydrangea paniculata, exhibiting upright growth, sturdy reddish-brown stems, large yellow-green inflorescences that retain color in autumn, and stable performance across environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional Hydrangea paniculata cultivars are used, then they exhibit variability under different environmental conditions, but they lack compact and freely-branching varieties with strong stems and large inflorescences with stable color
Solution Approach 1:
The patent applies parameter changes by selecting and breeding for specific genetic parameters that control color stability (maintaining yellow-green sterile flower color through autumn) and growth parameters (compact habit, strong stems). The breeding program specifically targeted these parameters to overcome the variability of conventional cultivars while maintaining adaptability to different garden conditions.
2Area of moving object
If larger inflorescences are developed, then showiness is improved, but plant size increases reducing compactness
Solution Approach 1:
The patent applies local quality by concentrating growth resources to produce large, showy inflorescences at specific locations (terminal positions) on the plant, while maintaining an overall compact plant habit through controlled branching. This allows the plant to display large flowers without increasing overall plant size excessively, as the large inflorescences are localized features rather than uniform plant expansion.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘HP219902’, characterized by its upright to somewhat outwardly spreading and rounded to conical plant habit; vigorous growth habit and moderate growth rate; freely branching habit with strong, thick and sturdy stems that are reddish brown in color; freely and uniformly flowering habit; large inflorescences with numerous yellow green-colored sterile flowers that maintain their yellow green-color in the autumn; and good garden performance.