Hybrid Creeping Phlox 'Rocky Road Grape' Cultivar Traits
Solution Overview
Problem
There is a lack of a Hybrid Creeping Phlox cultivar that combines specific traits such as vigorous growth, dense spreading habit, prolonged flowering, and resistance to dry conditions, which are not adequately addressed by existing Phlox varieties.
Innovation Solution
The development of Phlox 'Rocky Road Grape', a hybrid cultivar resulting from crossing Phlox bifida subsp. stellaria as the female parent and Phlox douglasii 'Crackerjack' as the male parent, exhibiting unique characteristics like red-purple flowers that lighten to soft lavender, deep notches at petal tips, and excellent powdery mildew resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing Phlox varieties are used, then they have basic flowering characteristics, but they lack the combination of vigorous growth, dense spreading habit, prolonged flowering, and resistance to dry conditions
Solution Approach 1:
The patent combines multiple desirable traits from different Phlox parent plants into a single hybrid cultivar. The cross between Phlox bifida subsp. stellaria (providing vigorous growth and spreading habit) and Phlox douglasii 'Crackerjack' (providing flower quality and disease resistance) creates a unified plant that exhibits all desired characteristics simultaneously, resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The hybrid Phlox 'Rocky Road Grape' represents a composite genetic material that integrates traits from two different species. This genetic composite provides a stable combination of vigorous growth, dense spreading habit, prolonged flowering, and environmental resistance that cannot be achieved with single-parent varieties, thereby simultaneously improving adaptability and ensuring trait reliability.
2Productivity
If Phlox bifida subsp. stellaria is used as parent, then vigorous growth and spreading habit are achieved, but flower coverage is reduced
Solution Approach 1:
The hybrid combines the vigorous growth and spreading habit of Phlox bifida subsp. stellaria with the high flower coverage capability of Phlox douglasii 'Crackerjack'. The resulting plant produces abundant flowers that completely cover the spreading foliage, resolving the contradiction between productivity (growth vigor) and quantity (flower coverage).
3Shape
If Phlox douglasii 'Crackerjack' is used as parent, then open flowers with light magenta-red color are achieved, but petal depth and color intensity are reduced
Solution Approach 1:
The hybrid merges the open flower structure and light magenta-red coloration of Phlox douglasii 'Crackerjack' with the deeper color intensity and petal fullness inherited from Phlox bifida subsp. stellaria. The result is a flower that maintains the desirable open shape while exhibiting enhanced color strength and petal depth, resolving the contradiction between shape and strength.
4Reliability
If conventional Phlox varieties are planted, then basic flowering is achieved, but they show susceptibility to powdery mildew and poor performance in dry conditions
Solution Approach 1:
The hybrid Phlox 'Rocky Road Grape' exhibits resistance to powdery mildew and tolerance to dry conditions, converting the previously harmful environmental factors into beneficial traits. This disease and stress resistance ensures reliable flowering performance while reducing susceptibility to harmful factors, simultaneously improving reliability and reducing object-affected harmful factors.
Data Source
AI summary
A unique cultivar of Hybrid Creeping Phlox named ‘Rocky Road Grape’ characterized by vigorous, dense, spreading, multi-stemmed, winter-hardy habit with short, bright glossy-green, linear leaves. Flowering begins in mid-April and continuing for up to five weeks, in cool conditions, on heavily-branched peduncles and completely cover the plant in peak season. Petals are red-purple with a small dark-purple eye. Petals lighten to soft lavender with maturity. Petal apices are deeply notched. The new plant is able to withstand dry conditions once established, and the foliage stays clean and resists mildew. The new plant is especially suitable for the landscape as a potted plant and in the garden as a specimen or en masse.