Weigela florida Spring2 Compact Habit and Black-Purple Foliage

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Solution Overview

Problem

Existing Weigela cultivars lack a compact growth habit and abundant flowering in late spring, with foliage that is either too light or produces fewer flowers compared to 'Spring2', which exhibits unique characteristics such as glossy black-purple foliage and a very compact plant habit.

Innovation Solution

The new cultivar 'Spring2' of Weigela, characterized by a compact plant habit, glossy black-purple foliage, and abundant flowering in late spring, achieved through asexual propagation by softwood stem cuttings, distinguishing it from other cultivars like 'Tango', 'Verweig3', and 'Elvera'.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If existing Weigela cultivars are used, then they have lighter foliage color and less compact growth habit, but they produce fewer flowers and lack the glossy black-purple foliage characteristic

Engineering Contradiction:
Improveflower abundanceVSAvoidplant habit compactness
Core Design Contradiction:
Quantity of substanceVSShape

Solution Approach 1:

The patent introduces a new cultivar with fundamentally different phenotypic parameters including glossy black-purple foliage, very compact plant habit, and abundant flowering. This represents a parameter change in the biological characteristics of the Weigela plant, creating a new variety that simultaneously achieves compactness and high flower production without the trade-offs present in existing cultivars

Inventive Principle:
Principle #35Parameter changes

2Shape

If existing Weigela cultivars are used, then they have less compact growth habit, but they also produce significantly fewer flowers compared to 'Spring2'

Engineering Contradiction:
Improveplant habit compactnessVSAvoidflower abundance
Core Design Contradiction:
ShapeVSQuantity of substance

Solution Approach 1:

The new cultivar 'Spring2' exhibits a very compact plant habit while simultaneously producing an abundance of flowers, representing a parameter change that breaks the typical trade-off between plant compactness and flowering capacity. The cultivar achieves both compact growth form and high flower production as stable inherited characteristics

Inventive Principle:
Principle #35Parameter changes

3Shape

If existing Weigela cultivars are used, then they have lighter foliage color, but they lack the glossy black-purple foliage and abundant flowering combination

Engineering Contradiction:
Improvefoliage color and glossinessVSAvoidflower abundance
Core Design Contradiction:
ShapeVSQuantity of substance

Solution Approach 1:

The patent describes a cultivar with glossy black-purple foliage that simultaneously produces an abundance of flowers. This represents a parameter change in both foliage characteristics (color and surface properties) and reproductive output, achieving a combination of dark glossy foliage and high flower abundance that distinguishes it from existing cultivars

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUSPP30185P2<i>Weigela </i>plant named ‘Spring2’
Publication Date: 2019.02.12 VERHOEF GIJSBERTUS
  • USPP30185P2 patent drawing
  • USPP30185P2 patent drawing

AI summary

A new cultivar of Weigela florida, ‘Spring2’, characterized by its very compact plant habit, its glossy foliage that is black-purple in color, and its abundance of flowers in late spring.