How to Grow Petite Iris Katharine Hodgkin
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Petite Iris Katharine Hodgkin
Iris reticulata 'Katharine Hodgkin'
flowerA dwarf bearded iris cultivar known for its exquisite pale yellow and blue bicolor flowers with delicate veining. This miniature iris typically grows 10-15 inches tall and blooms in early spring, making it perfect for rock gardens, containers, and border edges. The flowers emit a subtle, sweet fragrance and emerge from narrow, grassy foliage.
When should you plant Petite Iris Katharine Hodgkin in your zone?
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Example Petite Iris Katharine Hodgkin timeline · Pittsburgh, PA (Zone 6b)
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Plant Petite Iris Katharine Hodgkin
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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First Petite Iris Katharine Hodgkin blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-8, with excellent cold hardiness
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Dormancy
October-FebruaryRhizomes are planted in fall and rest underground through winter. Foliage may not emerge until late winter.
Keep soil dry to very slightly moist. Protect from excessive wet. No fertilizer needed during dormancy.
Foliage Development
February-MarchNarrow, grassy, blue-green leaves emerge in late winter and early spring, growing upright to 10-12 inches tall.
Minimal watering; allow natural spring moisture. Begin light feeding with low-nitrogen fertilizer as growth accelerates.
Flowering
March-April (2-3 weeks)Delicate pale yellow falls with blue-purple veining and pale blue standards appear. Flowers are 1.5-2 inches wide with subtle fragrance.
Do not overwater during bloom. Deadhead spent flowers to encourage multiple blooms. Stake if needed in wind.
Post-Bloom & Foliage Maturation
April-MayAfter flowers fade, foliage continues to grow and strengthen. Leaves photosynthesize to build rhizome energy reserves.
Keep foliage intact; do not cut back. Water moderately if spring is dry. Apply balanced fertilizer to support rhizome development.
Dormancy Preparation
June-SeptemberFoliage yellows and dies back naturally. Rhizome stores energy and develops new growth buds for next year.
Reduce watering significantly. Allow foliage to naturally decline and be removed by weather or cutting back. Keep area dry through summer.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Inspect rhizomes at planting; discard any with soft spots. Remove and destroy infested plants in early summer when borers are active. Keep area clean of plant debris.
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and
(Fusarium spp., Pythium spp.)
Ensure excellent drainage; plant in raised beds or containers if native soil is heavy. Never overwater. Avoid mulch directly over rhizome. Remove and destroy infected rhizomes.
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Hand-pick at night; provide dry conditions (slugs prefer moisture). Use copper barriers or organic slug pellets if severe.
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Spray with strong water jet or insecticidal soap. Generally not a major problem on miniature iris.
Uses
Ornamental flower for fresh arrangements
CulinaryThe elegant bicolor blooms make exceptional cut flowers for small vases and spring bouquets. Their delicate fragrance and unusual color combination add sophisticated appeal to floral displays. [source]
Rock garden and alpine garden specimen
HouseholdPetite Iris Katharine Hodgkin is ideally suited for rock gardens, alpine troughs, and scree gardens where its dwarf stature and excellent drainage requirements are naturally met. [source]
Container and pot cultivation
HouseholdThrives in containers, raised beds, and pots where drainage can be precisely controlled. Perfect for patios, balconies, and small garden spaces. [source]
Early spring pollinator food source
WildlifeProvides valuable early nectar and pollen for emerging bees, hoverflies, and other spring pollinators when few other flowers are available. [source]
Hybridization and breeding material
CraftUsed by iris enthusiasts and breeders as a parent plant in dwarf bearded iris hybridization programs, contributing unique coloring genes to new cultivars. [source]
Harvest Tips
Cut flowers for bouquets in early morning when fully open. Cut stems at ground level with a sharp knife. Flowers last 5-7 days in a vase. For seed collection, allow one or two flowers to fade naturally on the plant; collect seed pods when they dry and split open (late spring/early summer). Note: 'Katharine Hodgkin' is sterile and does not set seed reliably.
Fun Facts
- 🌱 Katharine Hodgkin was named after the wife of plant hybridizer E.B. Anderson and was introduced in 1970 as one of the finest dwarf iris cultivars ever produced.
- 🌱 This iris is sometimes called a 'reticulated iris' because of the delicate net-like veining (reticulation) visible on its falls, a characteristic of Iris reticulata species.
- 🌱 Despite being a miniature iris, Katharine Hodgkin produces two to four flowers per rhizome under good conditions, providing extended bloom over several weeks.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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