Allegheny Monkeyflower

Light Needs

Partial Sun to Full Sun

(At Least 5 Hours of Direct Sunlight)

Mature Height

1-3 Feet

Mature Spread

1-3 Feet

Growing Zones

3 to 8

Native to Eastern and Central North America, the Allegheny Monkeyflower blooms from July through the end of September with soft lilac-purple and light-indigo tubular flowers with asymmetrical petals. This native perennial is also classified as a wildflower and is even an endangered species in Maine. The delicate and vibrant blooms live atop 1 to 3-inch tall, upright stalks, similar in appearance to a snapdragon. This variety is incredibly low maintenance, deer resistant, and adapted to wet areas; it is perfect for rain, water, and rock gardens. 

This perennial is practically hands-off once established in natural areas rich in water resources such as ponds, streams, and woodlands. It has no serious pest problems or diseases to note. The attractive colors and fragrant scents attract butterflies galore and support local bee colonies and other pollinators. Certain butterflies are even known to lay their eggs on this plant's leaves and support structures, creating the next generation! Plant this monkeyflower en masse to liven up your landscape or create an informal or cottage-style garden. 

Allegheny Monkeyflower Care

Hardy in zones 3 through 8, plant Allegheny Monkeyflower in moist, well-draining soil in full to partial sun. These plants can handle standing water, up to 6 inches deep. It will tolerate soils with chalk, clay, loam, or sand in any pH. This flower is incredibly tolerant to poorly draining soil and will thrive in areas where other flowers would die. Pinch off spent flowers as soon as they appear to encourage the development of fresh ones throughout the season. This plant will naturalize itself through self-seeding and creeping rhizomatous roots. If planting in the ground, water deeply during the first several weeks to encourage strong and healthy roots, and continue watering all growing season, keeping the soil consistently moist. Fertilize monthly with a water-soluble fish emulsion or leave Monkeyflower alone; it should be fine. 

This late summer bloomer will require the removal of old growth at the end of the season. Occasionally, thin your plants to avoid overcrowding and to increase proper air circulation. Also, divide the root systems of these plants to reduce the chance of the root balls becoming too entangled. 

Allegheny Monkeyflower Spacing

Allegheny monkeyflowers can reach a height and spread of 1 to 3 feet. Therefore, space your plantings at least 12 inches apart to account for their mature size.