Breeding Systems

Breeding systems have evolved in many plants to encourage outcrossing. This increases the availability of variation in which selection can work.

Latin Name Location Flowering season Description

Asparagus officinale



Mid to late summer

Asparagus is an herbaceous, perennial plant native to Europe’s western coast and growing to 100–150cm tall, with stout stems with branched feathery foliage. The flowers are bell-shaped, greenish-white to yellowish, produced singly or in clusters of two or three.

Forsythia x intermedia 'Arnold Giant'

Border forsythia


March to April

A vigorous upright, deciduous shrub that typically grows 2.4-3m tall. Large bright yellow flowers appear before its bright green foliage.