- 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 |
- SKU:
- ALCBL
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
Also Known 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
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
2.5 Quart
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
#1 Pot
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
#2 Pot
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
#3 Pot
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years 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 Addicts Guarantee (Included On All Plant Orders)
Plant Addicts always guarantees your plant(s) will arrive happy & healthy. However, plant(s) are being shipped through the mail & sometimes 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 more information on how to care for your new plants, please click on our guide below.
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 a new gardener or an expert. There are many variables outside of anyone's control that can cause a plant to die. Hungry animals, drought, poor soil conditions, over watering, diseases & pests are all good examples of what can cause plants to die. The Plant Addicts Warranty is a 1 year warranty protecting you from all of the unknowns and will replace your plant if something were to happen to it.
The warranty is purchased on a per plant basis and must be purchased at the same time as the plant(s). We will cover 100% of the price of the plant, but the warranty does not cover shipping costs. SImply let us know if your plant has died within 1 year of receiving it and we will get you a new one shipped out as soon as possible (depending on the time of the year and availability). We may ask for photos for documentation purposes, but we try to make the process as easy as possible.
For more information, please click on our page below.
Plant Shipping
Below are some factors we consider when determining when to ship the plants depending on the timing of the order.
Winter to Early Spring
We ship only when it's warm enough to plant in your growing zone.
Sometimes plants aren't completely ready to sell and ship in early spring. We will wait until the plants are ready before shipping so you don't get a subpar product.
For Southern plants we will be able to ship much earlier than plants coming from our northern nursery.
Summer
If there is extreme heat we may delay shipping for a week or several weeks.
We review what areas the plants are traveling through as well as your location.
Fall into Winter
We’ll ship plants out all the way up to the end of the fall planting season!
Winter
Get your order in early to reserve your plants for Spring planting!
Once your plant is shipped you’ll receive an automated email with tracking information.
Click here for more detailed shipping information.
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