The cultivar 'Heavenly Blue' has gained the Royal Horticultural Society's Award of Garden Merit.

Entity and relation annotations:
id: 0
type: entity
value: text: 'Heavenly Blue'
labels: <Production>
id: 1
type: entity
value: text: the Royal Horticultural Society's Award
labels: <Title>
id: 2
type: entity
value: text: Garden Merit
labels: <Organization>
type: relation
to_id: 1
labels: Organization:Establishes:Title
from_id: 2