Magnolia Honey Tulip is a compact tree with fragrant, tulip-shaped yellow flowers that bloom before the leaves.

Magnolia x loebneri 'Leonard Messel' is a compact cultivar with beautiful two-toned flowers.

Magnolia 'Rose Marie' is a small tree with fragrant, tulip-shaped, pink flowers with yellow stamens set against medium green leaves.

Magnolia 'Spring Welcome' is a super hardy to zone 3 with fragrant, white flowers.

Magnolia 'Tinkerbelle' has fragrant, tulip-shaped flowers in shades of dark magenta and pale pink.

Mangave 'Aztec King' is a large succulent that forms rosettes of silvery-blue foliage with faint burgundy spots.

Mangave 'Freckles and Speckles' forms succulent rosettes of green and lavender with burgundy spots.

Mangave 'Inkblot' forms succulent rosettes of green with dark maroon spots.

Mangave 'Navajo Princess' forms succulent rosettes of variegated blue-green foliage with cream margins.

Mangave 'Purple People Eater' forms succulent rosettes of blue-green foliage washed with reddish purple.

Mangave 'Red Wing' forms succulent rosettes in various shades of dark red.

Mangave 'Snow Leopard' is a variegated succulent of blue-green foliage with cream margins and pink spotting.

The Balang blue poppy, Meconopsis balangensis, is an extremely rare relative of the legendary Himalayan blue poppy.

The legendary Himalayan blue poppy, Meconopsis betonicifolia, is one of the best for the garden. This is the special white form.

Melinus nerviglumis 'Pink Crystal' is the tender ornamental ruby grass with airy pink to creamy seed heads and blue foliage.

Medlar (Mespilus germanica) 'Breda Giant' offers abundant crops of large, sweet, flavourful fruit with a pleasing texture.

Medlar (Mespilus germanica) 'OSU 9-20' offers prolific crops of sweet, chocolate-brown fruit with a hint of tartness.

Michelia (Magnolia) doltsopa 'Fairy White' is a compact evergreen magnolia with fragrant white flowers from early to late spring.

Monarda bradburiana 'Midnight Oil' is an uncommon bee balm with pink and cream tubular flowers on green to burgundy leaves.

Monarda Bee You 'Bee-Mine Lavender' is a compact, floriferous, and highly mildew resistant beebalm with lovely lavender flowers.

Monarda Electric Neon 'Coral' is a mid-sized beebalm with coral-pink flowers rich in nectar.

Monarda Electric Neon 'Pink' is a mid-sized beebalm with dark neon-pink flowers rich in nectar.

Monarda 'Judith's Fancy Fuchsia' is a tall, highly mildew-resistant beebalm with fragrant, fuchsia flowers and aromatic foliage.

Morus 'Pakistan' produces delicious, black, elongated fruits 3.5-5 inches long that resemble a long, tubular blackberry.

Murraya koenigii is the curry leaf tree and the source of fresh curry leaves, an integral spice in Indian cooking.