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Apostle Plant

Trimezia

Family: Iridaceae Non-native

The common name, Walking Iris' is derived from the plants' natural traits. New plantlets are formed at the end of each flower stalk and once flowering is complete the stalk falls over. At that point, a new plant begins to grow. This leads to the reference that the plant walks. Other common names include the word 'apostle', which refers to the undocumented belief that the plant will not flower until 12 or more leaves are present, referring to the 12 apostles. Growing from a corm or a rhizome, the walking iris is a genus of about 20 plants in the Iridaceae (iris) family found all over the tropical and subtropical regions of the Americas. Its genus comes from the Greek word ' tri ' and ' meze ' which translates to 'three' and 'greater'. Its flowers appear to be a cross between an orchid and an iris. The short-lived blooms last only one day. However, they will bloom for an extended period of time through the spring, summer and into the fall. Depending on the location, this plant can be grown as an evergreen or as a perennials. It is hardy in Zones 10 and 11, but can be container grown in cooler climates to be wintered indoors. Insects, Diseases, and Other Plant Problems: No serious insect or disease issues. In cooler locations, this plant may grow but will not produce flowers. Brown leaf tip indicate that the plant is receiving too much water.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 46 attributes.

How it fits the guild

Optimal soil pH Acid (<6.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Bulb
Life cycle
Bulb; Perennial
USDA zones
9a, 9b, 10a, 10b, 11a, 11b
Light
Deep shade (Less than 2 hours to no direct sunlight) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; High Organic Matter; Sand
Soil pH
Acid (<6.0)
Soil drainage
Good Drainage | Moist
Available space
12 inches-3 feet
Growth rate
Medium
Maintenance
Medium
Form & Appearance
Habit / form
Clumping; Erect
Texture
Coarse
Foliage
Deciduous
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Rosulate
Leaf shape
Linear
Leaf margin
Entire
Leaf feel
Glossy
Leaf size
> 6 inches long
Hairs present
No
Leaf detail
The long sword shaped foliage grows in fan-like manner. They emerge from the soil with no stem.
Flower color
Purple/Lavender; White
Flower value
Showy
Flower form
Head; Solitary
Flower shape
Radial
Flower size
1-3 inches
Flower detail
The showy flowers are a cross between an orchid and an iris. Its outer petals spread in a horizontal position. Three inner petals are curled.
Bloom time
Fall; Spring; Summer
Fruit detail
Inconspicuous.
Wildlife & Ecology
Native status
Non-native
Origin
Tropical and subtropical Americas
Play value
Attractive Flowers; Buffer; Colorful; Easy to Grow; Shade
Landscape Use
Landscape location
Container; Hanging Baskets; Near Septic; Walkways; Woodland
Landscape theme
Rock Garden; Shade Garden
Design feature
Accent; Border; Mass Planting; Small groups; Specimen
Garden tags
#perennial bulbs #evergreen #herbaceous bulb #bulb #short-lived perennials #short lived blooms #herbaceous perennial #deciduous #tropical #humidity tolerant #drought intolerant #perennial #short lived
Problems & Resistance
Insect problems
Narcissus Bulb Fly; Potato Aphid on Ornamental Plants
Propagation
Division; Seed

Planted at Hunnicutt

Nobody’s planted this one yet.