Hosta Sum and Substance
Hosta 'Sum and Substance'
outdoorOne of the largest hostas available, with massive chartreuse to golden-green leaves that can reach 12 inches across on mature plants. The substantial foliage provides bold texture and presence in shaded gardens even without flowers. Pale lavender flowers appear in mid-summer on tall spikes above the canopy.
Common Problems
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Care Guide
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Light
Part shade to full shade; avoid full sun which can scorch large leaves; morning sun with afternoon shade is acceptable.
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Water
Keep soil consistently moist; water deeply and regularly, especially during hot dry spells; mulch to retain moisture.
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Soil
Humus-rich, well-draining soil with good organic matter; prefers slightly acidic to neutral pH.
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Fertiliser
Apply balanced slow-release fertilizer in early spring; light feeding in early summer promotes growth.
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Temperature
Cold-hardy perennial; thrives in cool climates and tolerates temperatures from −30°F to 75°F (−34°C to 24°C).
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Humidity
Prefers moderate to high humidity; benefits from consistent moisture and humid conditions.
Toxicity
dangerousToxic to CatsdangerousToxic to Dogscheck_circleSafe for Children
Toxic to cats and dogs; all parts contain saponins which can cause gastrointestinal upset if ingested.
Common Diseases
Common Pests
Seasonal Care
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Resume regular watering and feeding as growth picks up.
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Peak growing season. Water and feed regularly.
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Reduce watering as growth slows. Stop heavy feeding.
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Minimal watering and feeding. Protect from frost if needed.