Species bigleaf hydrangea
Bigleaf Hydrangea macrophylla 'Horwack' PISTACHIO featuring flowers with mix of green, pink, purple, blue and cream tones and green leaves

bigleaf hydrangea

Hydrangea macrophylla 'Horwack' PISTACHIO

Bigleaf hydrangea is a beautiful flowering shrub, bearing large, white flowers in conical clusters against vibrant, dark-green foliage. The 'Horwack' PISTACHIO variety is especially eye-catching, with its popcorn-like flower heads, made up of delicate green blooms, that transition to warm pink. This low maintenance evergreen is easily pruned to desired size and shape, and is hardy down to 07-12 degrees Fahrenheit. It is lovely planted in groups as a border or foundation hedge and can become a stunning focal point in any garden.

Cycle:

Perennial

Watering:

Average

Hardiness Zone:

6 - 9

Flowers:

Pink to blue Flowers In Summer

Sun:

Deep shade, Filtered shade, Part sun/part shade

Soil:

Acidic, Alkaline, Well-drained

Fruits:

green Fruits Ready In Summer

Leaf:

Yes

Leaf Color:

green

Growth Rate:

High

Maintenance:

Moderate

Care Level:

Medium

watering

The Hydrangea macrophylla ‘Horwack’ Pistachio should be watered enough to keep the soil slightly moist. Watering frequency will depend on the area’s climate and season. In Spring and Summer, water regularly throughout the season, allowing the soil to dry out slightly in between watering. In Autumn, water less frequently but enough to keep the soil slightly moist. In Winter, water just until the soil is barely moist. If your Pistachio is planted in the ground, make sure to add a 2-3 inch layer of mulch to the surface to help maintain soil moisture. In general, you should water the plant enough so that there is 1-2 inches of water per week. If you’re able to, it is recommended to water your Pistachio deeply, to a depth of at least 6-8 inches, at least once every 2 weeks. Make sure not to overwater and cause waterlogging, as it could kill the plant.

sunlight

Bigleaf Hydrangea plants (Hydrangea macrophylla 'Horwack' PISTACHIO) thrive best with at least 4 hours of direct sunlight per day. When planting, place in a well-lit location that still receives some shade during parts of the day. This shrub grows best in soil with a pH between 5 and 6, which is slightly acidic. In general, morning sunlight is best, especially during the warmer months when temperatures can become too hot in the afternoon. If possible, try to provide some afternoon shade for your Bigleaf Hydrangea, especially in more hotter climates.

pruning

The bigleaf hydrangea (Hydrangea macrophylla 'Horwack' PISTACHIO) requires regular pruning throughout the year. The best time to prune this species is in the spring, soon after flowering has finished and the plant has begun to produce new growth. This pruning should consist of removing dead or damaged stems, and if desired, you can shape the shrub by reducing its height or width. In addition, the stems and flower heads should be thinned out in order to encourage new, healthy growth. During the summer, a light pruning should take place to remove any dead or wilting leaves. You should also continue to thin the stems and flower heads as needed. In the fall, the bigleaf hydrangea should be pruned slightly more severely. This may include cutting the plant back by half in order to promote vigorous blooming in the spring. After this pruning, the shrub should be trimmed in order to achieve the desired form and shape. Overall, pruning the bigleaf hydrangea (Hydrangea macrophylla 'Horwack' PISTACHIO) regularly throughout the year will help to keep the plant healthy and looking its best.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Starts Flowering

Harvest Fruit

Hardiness Map

⚠️ Perenual and its members cannot be held liable for any health issues that may arise from the information provided on the website or from using any of the plants found on the site. The information provided is intended to be used as general guidelines only.