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Penhill Dark Monarch Dinnerplate Dahlia

Dinnerplate Dahlia Penhill Dark Monarch
SKU: HC017422
per Bag of 3
Shipping begins the week of March 4th, 2024
‘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.
key features
Botanical Name
Dinnerplate Dahlia Penhill Dark Monarch
Growing Zones
Zone 3, Zone 4, Zone 5, Zone 6, Zone 7, Zone 8, Zone 9, Zone 10, Zone 11
Hardiness Zone
Zone 8, Zone 9, Zone 10, Zone 11
Attracts Butterflies, Attracts Hummingbirds, Easy To Grow, Long Bloom Time, Cut Flowers, Container Planting
Soil Moisture
Light Requirements
Full Sun
Mature Height
48-60" tall
Bloom Time
Summer until frost


‘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)