Commercially available

• Umsatweet

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Medium yellow Shrub.
Registration name: Umsatweet
Exhibition name: Tweety

Bred by Dr. Theera & Chantana Umsawasdi (United States).
Introduced in United States by Certified Nurseries in 2003 as 'Tweety'.

Shrub.  

Yellow.  None to mild fragrance.  17 to 25 petals.  Double (17-25 petals), in large clusters bloom form.  Occasional repeat later in the season.  

Medium, bushy, rounded, spreading.  Medium, semi-glossy, medium green foliage.  

Height: up to 4' (up to 120cm).  

USDA zone 6b through 9b (default).  Can be used for cut flower, garden, landscape or shrub.  Remove spent blooms to encourage re-bloom.  Spring Pruning: Remove old canes and dead or diseased wood and cut back canes that cross. In warmer climates, cut back the remaining canes by about one-third. In colder areas, you'll probably find you'll have to prune a little more than that.