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‘Penhill Dark Monarch’ Dahlia awakens the senses with luscious dusky plum petals. One of the most popular Dinnerplate Dahlias, it has ruffled petals in deep rose, raspberry, and buttermilk that bloom well into fall - brightening the garden just when summer’s flowers begin to fade. Dramatic 10-12” flowers make beautiful cut flowers or a garden focal point. Place in the back of a border or in front of tall ornamental grasses for a dramatic effect.
To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low
temperatures; the lower the zone number the colder the winter.
If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will
survive the winter temperatures in your area.
If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack
of freezing winter temperatures do not provide a time for winter dormancy (rest).
‘Penhill Dark Monarch’ Dahlia has beauty in spades as it dazzles
the mid- to-late summer garden with 10-12" flowers. ‘Penhill Dark
Monarch’ is a long-stemmed beauty that will light up the summer garden and wake
up the flower vase with breathtaking, long-lasting blooms. Perfect as a garden
focal point with its tall height and large blooms. A bee favorite, dahlias are
easy to grow in a sunny spot with good drainage. Plant the tubers once the soil
has warmed to 60F (about 2 weeks after your last frost) at a depth of 4-6 inches.
Water once if the soil is dry, otherwise, wait to water until the plants have
sprouted. Thereafter water regularly and deeply to encourage good growth. Once
the plants are 12 tall, pinch the centers back to encourage long stems, if
desired. Tall dahlias often require some staking, so plant your stakes along
with your tubers so you won’t risk damaging the plant later. Cut flowers when
they are almost fully open, just before they peak for longest blooms. (48-60"
tall x 18" wide)
More Information
SKU
HC017422
Common Name
Penhill Dark Monarch Dinnerplate Dahlia
Botanical Name
Dinnerplate Dahlia Penhill Dark Monarch
Item Package Size
Bag of 3
Flower Color
Pink
Flower Size
8-10" flowers
Light Requirements
Full Sun
Bloom Time
Summer until frost
Days To Bloom
Blooms in 56-119 days. (8-17 weeks)
Mature Height
48-60" tall
Bulb Spacing
1 bulb / tuber per sq. ft.
Planting Depth
Bulbs/Tubers should be planted 1-2" below the soil line.
Soil Type
Loamy Soil, Sandy Soil, Acidic Soil
Soil Moisture
Average
Ideal Region
Anywhere In The US, Northeast, Southeast, Midwest, West, Southwest, Hot Desert, Pacific Northwest, Coastal California
Advantages
Attract Butterflies, Attract Hummingbirds, Extended Bloom Time (more than 4 weeks), Easy To Grow, Good For Cut Flowers, Good For Containers
Additional Information
Perennial in zones 8-10. Annual in zones 2-7.
Zones
2, 3, 4, 5, 6, 7, 8, 9, 10
Ships As
Bulb, Rhizome, Tuber
Item Unit Of Measure
Bulb
Poisonous or Toxic to Animals
Tubers and leaves are toxic if eaten in large amounts. Toxic to dog, cats and horses.
Planting Time
Spring / Summer
Ships To Canada
No
Planting Guides
Summer Blooming Bulbs, including popular varieties such as gladiolus and dahlias, are planted in the spring and bloom in the summer. Most of these bulbs are tropical and require warm weather to be planted. There must not be any danger of frost and your ground temperature must have reached 55 degrees Fahrenheit before planting. Many
of our summer blooming bulbs can be planted as perennials in zones 9-10 (zone 8 if mulched), but should be treated as annuals in cooler climates. You can lift them and store them in the fall, or bring patio pots inside before frost. See page 15 of our Planting Guide for a bulb depth planting illustration. Read our article about How To Grow Dahlias.
Growing Dahlias: Plant Dahlia tubers after spring frosts in good garden soil with full sun. Dahlias must be protected from high winds, so we suggest you position them against a wall or be ready to stake them. Keep the plants well-watered and free of bugs, applying flower fertilizer as they grow. Your dahlias will be in full bloom by July or August, with the enormous flowers continuing to bloom until frost. As frost threatens, pull up the roots and trim off the stems. You can store the tubers in a cool dry place until the following spring.
View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.
Shipping
Zone
Shipping Status
Zone 2
Now Shipping
Zone 3
Now Shipping
Zone 4
Now Shipping
Zone 5
Now Shipping
Zone 6
Now Shipping
Zone 7
Now Shipping
Zone 8
Now Shipping
Zone 9
Now Shipping
Zone 10
Now Shipping
As soon as your order is placed you will receive a confirmation email. You will receive a second email the day your order ships telling you how it has been sent. Some perennials are shipped as potted plants, some as perennial roots packed in peat. The ‘Plant Information’ section describes how that item will ship. All perennials and spring-planted bulbs are packaged to withstand shipping and are fully-guaranteed. Please open upon receipt and follow the instructions included.
Perennials and spring-planted bulbs are shipped at the proper planting time for your hardiness zone. Perennial and spring-planted bulb orders will arrive separately from seeds. If your order requires more than one shipment and all items are shipping to the same address, there is no additional shipping charge. See our shipping information page for approximate ship dates and more detailed information. If you have any questions, please call Customer Service toll-free at (800) 925-9387 or contact us by email.
Shipping Rates
Our shipping rates are calculated based on our actual average shipping costs. We do not seek to profit from shipping fees, so rest assured that our shipping rates reflect an average of what it costs to get our guaranteed products safely to your door.
US Shipping Charges
Merchandise Total
Shipping Charges
Up to $19.99
$8.99
$20 to $34.99
$10.99
$35 to $49.99
$12.99
$50 to $74.99
$14.99
$75 to $99.99
$16.99
$100 and Over
$18.99
Canadian Shipping Charges
Merchandise
Shipping Charges
Up to $24.99
$14.95
$25 to $49.99
$19.95
$50 to $74.99
$24.95
$75 to $99.99
$29.95
$100 and Over
$39.95
We charge one low flat rate for shipping our products even if your order requires multiple shipments. If you have any questions, please call us at (800) 925-9387.
