Spiraea Walplum Compact Habit and Color Stability
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Solution Overview
Problem
Existing Spiraea japonica cultivars lack compact and stable varieties with colorful foliage, which limits their ornamental value in landscaping.
Innovation Solution
Development of the 'Walplum' cultivar through a breeding program involving self-pollination and selection of Spiraea japonica 'Goldflame' seedlings, resulting in compact, upright plants with deep red-purple shoot tips and olive green foliage, producing bright cerise flowers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional Spiraea japonica cultivars are used, then they provide basic ornamental value, but they lack compact form and stable colorful foliage
Solution Approach 1:
The breeding program selected for specific genetic parameters that control both plant size (compactness) and foliage color stability. Through multiple generations of selection, the cultivar 'Walplum' was developed with genes that simultaneously produce compact growth habit and stable colorful foliage, resolving the contradiction between achieving compact form and maintaining color stability.
2Quantity of substance
If larger Spiraea plants are grown, then they produce more flowers, but they lose compactness and become less suitable for landscape planting
Solution Approach 1:
The cultivar 'Walplum' exhibits local quality variations where different parts of the plant have optimized characteristics - the overall plant maintains compact dimensions (60 cm height, 50 cm width) while producing abundant flower clusters. The branching structure is specifically configured to maximize flower production within a compact form, allowing the plant to achieve both high flower quantity and landscape-appropriate size.
3Ease of manufacture
If green foliage is maintained throughout the season, then the plant is easier to grow, but it lacks ornamental interest and colorful features
Solution Approach 1:
The cultivar 'Walplum' incorporates genetic traits that produce dynamic color changes in the foliage throughout the growing season. New growth emerges with vibrant red-purple shoot tips that gradually transition to olive green as the season progresses. This natural color progression provides continuous ornamental interest while the plant maintains its hardiness and ease of cultivation, as the color changes are genetically determined rather than requiring environmental stress.
Data Source
AI summary
A new cultivar of Spiraea named ‘Walplum’ that is characterized by compact upright habit, deep red-purple new leaf tip growth which becomes olive green as growth continues. The buds of ‘Walplum’ are red-purple in color and develop into clusters of bright cerise colored flowers in late spring and early summer. ‘Walplum’ is hardy to USDA Zone 3.