Saturday, May 1, 2010

Wallflower

Erysimum

* photos taken on May 1 2014 in Elkridge, MD


Erysimum allionii
A perennial, reaching up to 2 x 2 feet.
The leaves are up to 3 inches in length.
The fragrant orange flowers are borne during spring.
Hardy zones 4 to 7 in full sun.

Erysimum asperum ( Siberian Wall Flower )
A biennial to occasional perennial reaching a maximum size of 4 x 3 feet.
The lance-shaped to oblong leaves are mid-green.
The large, bright yellow to orange flowers are borne during early summer.
Hardy zones 3 to 7 in full sun on well drained ( even gravelly ) soil.

Erysimum 'Bowles Mauve'
A fast growing, shrubby perennial, reaching a maximum size of 3 x 6 ( typical half that ) feet.
The narrow lance-shaped leaves are blue-green.
The reddish-pink flowers, up to 1 inch across, are borne mid-spring through late summer or even mid-autumn if deadheaded.
Hardy zones 7 to 9 ( 6 on protected sites ) in full sun on well drained soil. Cut back by half after first flush of blooms for repeat flowering and more compact habit. Propagation is from softwood cuttings during spring or summer.

* photo taken on Apr 26 2016 in Columbia, MD

* photos taken by Milan Havlis, owner of central Europe's premier plant nursery


Erysimum 'Bee's Jubilee'
A dense, neat, carpet-forming perennial, reaching a maximum size of 10 x 16 inches.
The very profuse, deep golden-yellow flowers are deep red in bud.
Hardy zones 3 to 7 in full sun.

Erysimum dubium
A low mat-forming perennial, reaching a maximum height of 3 inches.
The yellow flowers are borne spring to early summer.
Hardy zones 3 to 7 in full sun.

Erysimum helveticum ( Swiss Wallflower )
A low, compact perennial, reaching a maximum size of 6 x 8 inches, that is native to southeastern Europe.
The fragrant, orange-yellow flowers are borne in racemes throughout spring.
Hardy zones 3 to 7 in full sun.

Erysimum kotschyanum
A moderate growing, dwarf perennial, reaching a maximum size of 6 inches x 1 foot, that is native to Persia.
The leaves are up to 0.5 inches in length.
The fragrant, bright yellow flowers are borne all summer long.
Hardy zones 6 to 8. Easy to grow but only in climates with reasonably cool summers.

Erysimum linifolium ( Perennial Wallflower )
A short-lived, evergreen, shrubby perennial, reaching up to 2.5 x 2.3 ( rarely over 2 ) feet in size.
The linear leaves are mid-green.
The flowers can be purple, pink or orange, often with all colors on the same plant.
They are borne mid to late spring, often repeating until autumn frosts if deadheaded.
Hardy zones 7 to 9 ( 6 on protected sites ) in full sun to partial shade on moderately moist, well drained soil. It is very tolerant of heat and humidity, thriving in the southeastern U.S. Propagation is from seed or softwood cuttings taken during spring or summer.

'Variegatum'
A perennial reaching a maximum size of 2.3 feet x 20 inches ( rarely over 1 foot in height ). It makes an excellent container plant.
The handsome foliage is gray-green and edged in creamy-white.
The purplish-pink flowers are borne late spring into mid autumn.
Hardy zones 7 to 9 in full sun on well drained soil. It is recommended to shear it back to 6 inches during mid summer to encouraged a dense habit and to stimulate new growth.

* photo taken on April 28 2010 in Columbia, MD






Erysimum 'Plant World Lemon'
A compact, spreading perennial.
Pink and yellow flowers are borne on the same plant from mid spring to early summer.
Hardy zones 3 to 7 in full sun.

Erysimum 'Yellow Bird'
A perennial, reaching up to 1 foot in height.
The fragrant, golden-yellow flowers are borne mid to late spring.
Hardy zones 3 to 7 in full sun.

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