H. ‘Dr John’

AI-generated watercolor illustration of Hosta 'Dr John' (not a photograph)
AI-generated watercolor illustration by The Hosta Farm — not a photograph of this cultivar. How we use images

Hosta ‘Dr John’ is a registered cultivar () .

Year registered2007
Section classI-1 (Giant)

Overview

Registered in 2007 from seedling parents, 'Dr John' is a giant variegated hosta reaching 24 inches in height and 44 inches in diameter. Its most distinctive features are the large, broadly ovate leaves with dark green, slightly rippled margins and a notable reflexive flower scape bearing clear white flowers.

In the Garden

'Dr John' performs best in partial to full shade, typical for variegated hostas, where its substantial 12-inch-long by 13-inch-wide leaves can develop fully without scorching. The plant's upright, moderate growth habit and giant mature size make it suitable as a specimen or back-of-border accent in larger shade gardens. Its large scapes, reaching 55 to 60 inches, elevate the white flowers well above the foliage, adding vertical interest.

Care Notes

Provide consistent moisture, especially during establishment, and apply a balanced fertilizer in early spring as new growth emerges. Like most hostas, 'Dr John' is susceptible to slug damage on its broad leaves and may require protection from deer in areas where they are prevalent.

This summary was generated with AI from the registry record and has not been reviewed yet; the registry data on this page is the reference. How we use AI.

Size and leaf

Clump height24 in (61 cm)
Clump width44 in (111.8 cm)
Leaf length12 in (30.5 cm)
Leaf width13 in (33 cm)
Vein pairs17
Leafdark green slightly rippled margins; slightly shiny on top; dull underneath; lightly wavy
Flower scape height55–60 in (139.7–152.4 cm)
Notable characteristicslarge reflexive flower scape, clear white flower color

From the American Hosta Society Registry record.

Parentage

  • Pod parent: seedling
  • Pollen parent: seedling

Similar cultivars

Other registered hostas in the same AHS section class (I-1, giant size):

Related guides

Registration data: AHS Registry #1501. How we check this data.