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Nurseries & Gardens

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Isodon longitubus

Also Known As

Plectranthus effusus var. longitubus
Plectranthus longituba
Plectranthus longitubus
Rabdosia longituba
Long-tubed Trumpet Spurflower
Trumpet Spurflower

Plant type

shrub, perennial

size

H: 2'-4'
W: 2'-4'

planting zones

6a-8b

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Isodon longitubus plant details

Isodon longitubus is a broadleaf deciduous perennial shrub with green and purple foliage. In fall and summer blue and purple flowers emerge. Grows well with sun - mostly shade and even moisture - regular water. Adapts to various soil conditions. Does well in average, rich and well-drained soil.

CHARACTERISTICS OF Isodon longitubus

Plant type: perennial shrub
Plant family: lamiaceae
Foliage: deciduous green and purple
Mature size: 2 FT - 4 FT - wide, 2 FT - 4 FT - tall
Flowers: blue and purple blooms in fall and summer
Uses: fall color, serrated leaves, woodland garden

GROWING CONDITIONS for Isodon longitubus

USDA Zones: 6a - 8b
Sun exposure: sun - mostly shade
Watering frequency: even moisture - regular

Soil needs: average, rich and well-drained

Nursery contributed plant descriptions

Seemingly airborne swarms of small, elegant, blue, tubular flowers bloom in fall on this tall woodland perennial gem from the mountains of Japan. Fall is a terrific time for blue in the garden. And just when so many other plants are deflating, this one comes along to extend the flower season. 2 - 3' tall, clumping.Minimum temperature: -10° F.

By: Dancing Oaks Nursery

A great new plant from the shaded mountainsides of Shikoku and Kyushu, this late blooming gem features open panicles with hundreds of long tubular purplish blue flowers, Rabdosia is related to Plectranthus and was formerly placed there by some authorities. All in all a remarkable plant, it is particularly nice combined with Tricyrtis, Aconitum wilsonii and Cyclamen hederiifolium. ZONE 5

By: Arrowhead Alpines

Think of this as a woodland Salvia which blooms in the Fall. This Japanese jewel brings an unexpected and welcome shot of color to the shade garden in Fall with airy panicles holding zillions of small tubular purple-blue flowers. Something nice to look at as you are cleaning up the shade garden in the Fall.