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Blacknight Hollyhock

$28.49
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SKU:
ALCBLQT
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$28.49
This product does not ship to:
Idaho
  • Full Sun (At Least 6 Hours Of Direct Sunlight)
  • Mature Height 5 - 6 Feet
  • Mature Spread 5 - 6 Feet
  • Growing Zones 3 - 9
  • Use As A Thriller In Containers

Unlike other hollyhocks, which typically live only 2 years, Blacknight Hollyhock (Alcea rosea ‘Blacknight’) is a perennial version of the tall, sun-loving flowers. And you will be glad it comes back, since the flowers on Blacknight are, well, nearly as dark as night. The maroon-black blooms are the perfect frontman for a wall or fence, as the plants will come to grow 5 to 6 feet high and spread flowers across their nearly 2-foot spread.  Hummingbirds and butterflies will be thrilled when they visit the blooms.

The large, single-type flowers and round, lobed leaves of the hollyhock can evoke a cottage feel or a natural and colorful effect, depending on how you plant them. They do contrast best with a solid backdrop, and tend to need no staking if located near a fence or wall. However, feel free to place these beauties in the middle of a garden bed if you want some tall, dark color. Hollyhocks love sun and this Blacknight variety should come back each year (as a short-lived perennial) in zones 3 through 9.

Blacknight Hollyhock Care

Be sure to plant your hollyhock in a spot that receives at least 6 hours of sun a day. If you choose to plant them in an open site, be aware that the plant might need some staking while in full bloom, although the stalks are strong. The plants benefit from average soil fertility, but can grow in any soil that drains well. Regular water helps a hollyhock bloom, but established plants can handle some drought. The plants tend to grow quickly, but giving them some compost or a balanced fertilizer in spring as they reappear gives them a yearly boost.

Hollyhocks do not need deadheading, but pinching off dried-up blooms can help keep the plant looking cleaner. In fall, prune your hollyhock back to about 6 inches above the ground. Spread a thick (4- to 6-inch layer) of straw or other mulch around the ground above the roots to help protect the plant. Remove the mulch once danger of frost passes in spring. 

Blacknight Hollyhock Spacing

For a stunning black border or cottage row effect, plant several hollyhocks together. Be sure to space the young plants about a foot apart to give each room to spread in summer.

Blacknight Hollyhock Information

USDA Hardiness Zones: 3 - 9
Plant Type: Perennials
Light Exposure: Full Sun (At Least 6 Hours Of Direct Sunlight)
Mature Height: 5 - 6 Feet
Mature Spread: 24 Inches
Spacing: 24 Inches
Habit: Upright
Flower Color(s): Purple
Flower Description: Purple Shades To Near Black Shades
Bloom Period: Mid-Summer
Foliage Type: Herbaceous
Foliage Color(s): Green
Foliage Description: Green shades
Seasonal Interest: Summer Flowering
Watering: Average
Resists: Pests & Insects
Tolerates: Drought
Attracts: Butterflies, Hummingbirds
Container Role: Thriller
Uses: Borders, Containers, Mass Planting, Specimen or Focal Point, Wildlife Gardens
Features: Attracts Pollinators, Cut Flowers, Low Maintenance
Brand: Proven Winners
Common Name: Blacknight Hollyhock
Other Name(s):
Scientific Name: Alcea rosea

Container Sizes

Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on; type of plant, time of year, last pruning & many other factors.

4.5 Pot

4.5" Pot
 Also Know As:
   4.5" Container

 Plant Age:
   ~ 6 months
 Plant Size:
   ~ 3"-6"
 Pot Size:
   ~ 4.5"H x 3.75"W
 Volume:
   1.42 quarts

Quart Pot

Quart Pot
 Also Know As:
   Quart

 Plant Age:
   ~ 1 year old
 Plant Size:
   ~ 4"-8"
 Pot Size:
   ~ 4.75"H x 4.5"W
 Volume:
   1.50 quarts

2.5 Quart

2.5 Quart
 Also Know As:
   2.5 Quart Pot

 Plant Age:
   ~ 1.5 year old
 Plant Size:
   ~ 8"-12"
 Pot Size:
   ~ 6.5"H x 6.5"W
 Volume:
   2.20-2.30 quarts

#1 Pot

#1 Pot
 Also Know As:
   #1 Container
    1 Gallon
 Plant Age:
   ~ 2 year old
 Plant Size:
   ~ 10"-14"
 Pot Size:
   ~ 7"H x 7.75"W
 Volume:
   2.26-3.73 quarts

#2 Pot

#2 Pot
 Also Know As:
   #2 Container
    2 Gallon
 Plant Age:
   ~ 2-3 year old
 Plant Size:
   ~ 12"-18"
 Pot Size:
   ~ 9.5"H x 9.5"W
 Volume:
   1.19-1.76 gallons

#3 Pot

#3 Pot
 Also Know As:
   #3 Container
    3 Gallon
 Plant Age:
   ~ 3-4 year old
 Plant Size:
   ~ 12"-30"
 Pot Size:
   ~9.5"H x 11"W
 Volume:
   2.32-2.76 gallons


For more detailed information, please click here.

Plant Addict Guarantee (Included On All Plant Orders)

Plant Addicts guarantees your plant(s) will arrive happy and healthy, but the plant(s) are being shipped through the mail and accidents happen. If the plant is dead, has dried out roots or the incorrect item was shipped just notify Plant Addicts within 3 days upon delivery. We may ask for pictures but will try to make it as easy as possible for you. Please note plant(s) with damaged branches or wilted leaves will not qualify for this guarantee. Plants are very resilient and will rebound quickly when cared for correctly.

For information on how to care for you new plant please check out our guide. Guide: How to Care for Your New Plant(s)

Plant Addicts Warranty - 1 Year (Extra Purchase Required)

We encourage all plant lovers to purchase the Plant Addicts Warranty whether you’re new or an expert. There are many variables outside our control and yours that can cause the demise of your plant(s). Examples would be hungry animals, drought, poor soil conditions, over watering, disease, insects & many other factors. The Plant Addicts Warranty is a 1 year warranty protecting you from all the unknowns and will replace your plant if it moves on to the plant afterlife.

The warranty is purchased on a per plant basis and must be purchased at the same time as the plant purchase. We will cover 100% of the price of the plant but the warranty does not cover shipping cost. Simply let us know if your plant has died within one year of receiving it and we’ll get you a new one shipped out. We may ask for photos for documentation purposes but again we’ll try to make it as easy as possible.

For more information, please go to our Shipping & Returns page at the bottom of the website.

Guide: How to Care for Your New Plant(s)

Planter Shipping

Standard Colors: 2-3 business days

Special Order Colors: 8 weeks - this is due to the planter being custom made with the color(s) of your choice

Please Note: On special orders there can not be any cancellations

Plant Shipping

Time of Order:

Summer Shipping

  • If there is extreme heat we’ll delay shipping.  
    • We’ll have to review what areas the plants are traveling through along with your location


Once your plant is shipped you’ll receive an email with tracking information. Depending on the above criteria we’ll ship your plant(s) towards beginning of the following week from your order. We put together this helpful guide of what to do when you receive your plants in the mail.

It is important to know that all of our plants are clearly labeled for which growing zones the plant can survive in. The plants are thoroughly trialed and tested in every growing zone before we state the plant can grow in a zone. Again, our #1 priority is to ship the plants to you healthy and ready to thrive in your location. So we will do everything in our power to do so.