Hydrangea macrophylla 'Horwack' (Next Generation™ Pistachio Hydrangea)
Botanical Information
| Family | Hydrangeaceae |
| Genus | Hydrangea |
| Species | macrophylla |
| Cultivar | 'Horwack' |
| Tradmarked Name | Next Generation™ |
| Patent Number | PPAF |
| Category | Woody |
| Type | Shrub (deciduous) |
Details
| USDA Hardiness Zone | 6 - 9 |
| USDA Hardiness Ref. | |
| Canadian Hardiness Zone | 5a - 8a |
| Canada Hardiness Ref. | |
| RHS Hardiness Zone | H7 - H3 |
| RHS Hardiness Ref. | |
| Temperature (°C) | -23 - (-4) |
| Temperature (°F) | -10 - 25 |
| Height | 1 m |
| Spread | 1.5 m |
| Growth | Medium |
| Flowering Period | June, July, August, September, October |
Description and Growing Information
| Shape | Forms a rounded mound. |
| Cultivation | Grow in partial shade in a moist, well-drained soil. Tends to be more winter hardy than many other H. macrophylla cultivars. |
| Pests | Aphids may be an occasional nuisance. |
| Habitat | Horticultural origin. |
| Flower/Leaf Bud Description | Flower buds tend to form on old wood. |
| Leaf Description | Leaves to 15 cm in length, and are glossy green. |
| Flower Description | Flowers appear in dense clusters often starting green tinged chartreuse then developing a scarlet red to violet colouring with a chartreuse-green tinge and a small blue eye. |