Hydrangea involucrata 'Wim Rutten' (Blue Bunny Hydrangea) - Monthly Plant Care Calendar
Written by Proven Winners
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BLUE BUNNY hydrangea is a drift of blue lacecap flowers from mid-summer until fall. It forms its flowers buds on new wood and so blooms reliably every year. It is a strong growing plant that produces an abundance of distinctive blue flowers which makes an elegant addition to mixed beds. Color is not affected by soil pH.
Here's what you should be doing each month of the year for this plant in USDA Zones 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b: Find Your Climate Zone.
Learn more about this plant at proven winners here: www.provenwinners.com/plants/hydrangea/blue-bunny-bracted-hydrangea-hydrangea-involucrata
Click on a month below to be taken directly that month's plant care:
January - February - March - April - May - June - July - August - September - October - November - December
January
PRUNE
Do not prune.
February
PRUNE
Do not prune.
March
BUY
For those of you in warmer zones, purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
For those of you in warmer zones, plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night. For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
PRUNE
Flowering Shrubs: Get plant care reminders sent to you for the plants in YOUR garden. Click below to visit each plant and their available plant care! Plant Care (382)Rosa hybrid 'Rainbows End' Rainbows End Miniature Rose 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 SteveBrigham Rosa hybrid 'Southern Belle' Southern Belle Grandiflora Rose 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 SteveBrigham Anigozanthos sp 'Harmony' Kangaroo Paws 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 8b, 9a, 9b, 10a, 10b, 11 Lucy Ceanothus griseus var. horizontalis 'Yankee Point' Yankee Point Carmel Creeping Ceanothus 18, 19, 20, 21, 22, 23, 24 SteveBrigham |
Do not prune. For those of you in Zone 6, prune with caution! If your area has already begun to warm up and leaf initiation is visible, don't compromise this season's flower buds. Put off pruning until the following winter.
MULCH
Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
April
BUY
Purchase shrubs after the threat of frost has passed. If you buy sooner, be sure to provide protection to the tender new top growth at night. When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
Plant as soon as the threat of frost has passed and the soil is workable. If the threat of frost persists, be sure to provide protection to tender new growth of the plant by covering at night. For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
FERTILIZE
A top dressing of a granular slow release fertilizer in early spring is all this hardy shrub will need.
PRUNE
Do not prune.
MULCH
Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk. Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
May
BUY
Now is a great time to visit your garden center to see whats new. When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
Ready to get out into your garden? It isn't too late to add new plants to your garden! However, with the increasing heat and longer days, pay extra attention to the watering needs of freshly planted shrubs. For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
FERTILIZE
A top dressing of a granular slow release fertilizer in early spring is all this hardy shrub will need.
WATER
As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, supplemental watering may be needed in very hot weather. May do better in part shade in the south.
PRUNE
Do not prune.
MULCH
Applying mulch around your flowering shrubs in the spring is a great idea. Not only does it look attractive, it keeps roots cool, conserves soil moisture, reduces water requirements, and acts as an effective weed barrier. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
June
BUY
For Zone 6, June isn't too late to add to your garden . When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
For Zone 6, June isn't too late to add new plants to your garden! However, with the increasing heat and longer days, pay extra attention to the watering needs of freshly planted shrubs. For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Apply a granular slow release fertilizer and water in well. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
WATER
As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, supplemental watering may be needed in very hot weather. May do better in part shade in the south.
PRUNE
Do not prune.
July
WATER
As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, supplemental watering may be needed in very hot weather. May do better in part shade in the south.
PRUNE
Lightly prune to shape immediately after flowering.
August
WATER
As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, supplemental watering may be needed in very hot weather. May do better in part shade in the south.
PRUNE
Lightly prune to shape immediately after flowering.
September
Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide it's energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, that will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering. When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
Planting flowering shrubs now is a great time to get a jump on next year's garden! For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
WATER
As a rule of thumb, apply 1 inch of water per week during the first growing season. Be mindful of hot days and periods of drought. Once established, supplemental watering may be needed in very hot weather. May do better in part shade in the south.
PRUNE
Do not prune.
MULCH
Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
October
BUY
Visit your independent garden center now because fall is the best time to purchase shrubs! Here's why: In the spring, a new plant would have to divide it's energy between settling into a new home and growing immediately. In the fall however, the short days are causing the top to go dormant. All the while, the warm soil, that will persist for the coming weeks or months, provides the perfect environment for roots to acclimate. Once spring arrives, the happily established plant can focus on growing and flowering. When choosing plants, don't be shy about popping the plant out of it's pot to inspect the roots. The root mass should be free of black, mushy sections and amply fill the container. Remember, the more roots the better!
PLANT
Planting flowering shrubs now is a great time to get a jump on next year's garden! For BLUE BUNNY, choose a medium to sunny location. Requires moist, well drained soil. Supplemental watering may be needed in very hot weather. May do better in part shade in the south. Save the application of a granular slow-release fertilizer for spring to avoid the initiation of tender new growth. It is recommended to apply 1 inch of water per week during the first growing season and be extra mindful during periods of heat and drought.
PRUNE
Do not prune.
MULCH
Applying a winter top-dressing of mulch will provide protection to the roots from severe winter temperatures and frost heaving. Spread mulch evenly to a depth of 2 to 3 inches (if replenishing, don't allow build up to exceed 4" in depth). If your shrub is in lawn, mulch a ring between 3 to 6 feet in diameter around the trunk. Be careful to keep mulch an inch away from the shrub's trunk.
November
PRUNE
Do not prune.
December
PRUNE
Do not prune.
______________________________________________________________
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You can get these instructions sent directly to your Profile page, click here to learn how.
- You can get Plant Care Reminders sent directly to your Profile page, learn how.
- See all of Proven Winners Color Choice Monthly Plant Care Reminders here.
- See all available Plant Care Reminders at the Plant Care Hub here.
- Search for plant care alphabetically here.
- Add Hydrangea involucrata 'Wim Rutten' (Blue Bunny Hydrangea) to one of your plant lists, learn how.
- Search our plant database for photos and more great information here.

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