|The so-called Tree Peony is really a deciduous shrub, with flowers up to 1 foot across. Single, semi-double, and double, silky-petaled blooms are white, pink, lavender, purple, yellow, and bicolor. Bloom best in cold climates, but need less winter chill than Herbaceous Peonies. Choose the planting location carefully since they live a long time and dislike begin moved. Hardy in cold, they prefer full sun or partial sun in Zones 8 and 9. Plant grafted peonies 6 to 12 inches above the bud union. Choose seedlings in bloom to be sure what you are getting. Sold bareroot in winter or in containers year-round.
Some yellow varieties to look for are 'Canary' (single-flowering), 'Helios' (semi-double), and 'Golden Mandarin' (double).
Attributes - Paeonia suffruticosa 'Yellow'
Plant Type: Shrub
Bloom Season: Mid Spring through Early Summer
Flower Color: Yellow
Height: 3 ft. to 6 ft.
Width: 6 ft.
Sunlight: Full Sun
Climate: Zones 2, 3, 4, 5, 6, 7, 8, 9, 10
Notes: Cut Flowers, Fragrant, Low Maintenance, Showy Flowers.