How to Grow Hosta 'Sum and Substance'
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Hosta 'Sum and Substance'
Hosta 'Sum and Substance'
shrubA stunning large-leafed hosta cultivar renowned for its massive, chartreuse-yellow leaves that can reach 10-12 inches long and 8-10 inches wide. This vigorous perennial forms impressive mounds and is prized as a specimen plant or focal point in shade gardens. The foliage provides dramatic color and texture, with delicate lavender flowers appearing on tall spikes in mid to late summer.
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Example Hosta 'Sum and Substance' timeline · Pittsburgh, PA (Zone 6b)
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Plant Hosta 'Sum and Substance'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Hosta 'Sum and Substance'
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; performs best in zones 4-8 with consistent moisture
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Establishment (Year 1)
Spring through fall of first seasonNew shoots emerge in spring with small leaves; plant focuses on root development rather than foliar growth
Water regularly and consistently; apply 2-3 inches of mulch around base; avoid disturbance; fertilize monthly with balanced fertilizer; remove any flower spikes to direct energy to leaf growth
Full Maturity (Year 4+)
Indefinite with proper carePlant reaches maximum leaf size (10-12 inches) with vibrant yellow-chartreuse coloring; mound can spread 3-4 feet wide and 2-3 feet tall; foliage is dense and impressive
Maintain established care routine; divide every 5-7 years if desired; allow flower spikes to develop for seasonal interest; monitor for pest damage on large leaves
Flowering
4-6 weeks mid-summerTall spikes (18-24 inches) emerge from foliage bearing fragrant pale lavender to white flowers arranged densely on the spike
Flowers appear mid to late summer; deadhead after blooming or leave for ornamental seed pods; flowering does not significantly impact foliage production
Dormancy (Winter)
November through March depending on zoneFoliage yellows, browns, and dies back completely; plant is completely underground; crown remains dormant but viable
Cut back dead foliage in fall or early spring; apply protective mulch layer (3-4 inches) in cold zones; no watering needed; new shoots will emerge the following spring
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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and
Hand-pick early morning or evening; apply copper tape barriers; use beer traps; encourage natural predators (birds, beetles); apply neem oil or diatomaceous earth; avoid overwatering which encourages mollusks
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No cure; remove and destroy infected plants immediately; sterilize tools between cuts; purchase from reputable nurseries; monitor for mottling or streaking in leaves
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Remove affected leaves immediately; water only at soil level to avoid splashing; improve air circulation; severely infected plants should be removed and destroyed
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Hand-pick in early morning; use pheromone traps away from plants; apply neem oil weekly; encourage beneficial wasps; avoid Japanese beetle traps near the plant
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Install deer fencing (6-8 feet tall); apply deer repellent sprays; use scent-based deterrents (human hair, bars of soap, predator urine)
Uses
Ornamental shade garden focal point
HouseholdThis cultivar's enormous, vibrant chartreuse leaves make it an exceptional specimen plant or focal point in shade gardens, foundation plantings, and woodland borders. The dramatic foliage provides year-round visual interest and architectural structure. [source]
Floral arrangements and displays
CraftLarge hosta leaves and flowering spikes are valued in floral design and cut flower arrangements. The leaves add texture and substance to mixed arrangements, while the delicate flower spikes provide height and elegance. [source]
Pollinator nectar source
WildlifeThe fragrant lavender flower spikes attract bees, butterflies, and other beneficial pollinators in mid to late summer. While primarily a foliage plant, the flowers provide an important nectar source for declining pollinator populations. [source]
Low-maintenance landscape cover
HouseholdOnce established, 'Sum and Substance' requires minimal maintenance compared to other perennials. It suppresses weeds through dense foliage cover and improves soil structure through organic matter accumulation. [source]
Traditional Asian herbal use
MedicinalVarious hosta species have been used in traditional Korean and Japanese herbalism for centuries. While 'Sum and Substance' is primarily ornamental, hosta foliage has been researched for potential antioxidant and anti-inflammatory properties. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Hostas are not harvested but rather admired as foliage plants. Mature leaves can be carefully removed for floral arrangements (cut at base of petiole), but this should be minimal. Flower spikes can be cut for arrangements when they reach full bloom in summer. Never remove more than 25% of foliage at one time to maintain plant health.
Fun Facts
- 🌱 'Sum and Substance' was hybridized and named by Paul Aden, a legendary hosta breeder who developed over 200 hosta cultivars and revolutionized hosta breeding in the late 20th century.
- 🌱 The yellow-chartreuse leaf color intensifies with morning light exposure but can scorch in afternoon sun; in deep shade, leaves tend toward a more yellow-green tone.
- 🌱 A mature 'Sum and Substance' plant can produce over 150 leaves and grow so large that it requires 3-4 years to reach full size and can eventually require division to maintain vigor.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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