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Plants with Black Flowers for Sale - Buying & Growing Guide

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Plants with Black Flowers – Buying & Growing Guide

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by Mary Van Keuren | Gardener (30+ Years Experience) – last update on December 2, 2021

When you think of a garden, black flowers are not usually the first thing to come to mind. Yet they can add elegance and mystery to your landscaping. Most black flowers are actually a very dark purple or red and were created through careful breeding. Explore the different types of black flowers and learn how they can enhance your garden.

Types of Black Flowers

Type  Growing Zones Mature Height Sun Features
Black Barlow Columbine, Aquilegia vulgaris var. Stellata ‘Black Barlow’ 3-9 1-3 feet Full to partial sun: 4 hours of light or more Perennial; excellent cut flowers; rich plum-purple flowers; ferny foliage
Blacknight Hollyhock, Alcea rosea ‘Blacknight’ 3-9 5-6 feet Full sun: 6 or more hours a day Robust perennial; funnel-shaped 4 inch deep purple blooms; attracts pollinators
Black Surprise Sword-Lily, Gladiolus ‘Black Surprise’ 8-11 3-4 feet Full sun: 6 or more hours a day Velvety burgundy-black flowers; grown from corms; excellent cut flowers 
Men in Black Bearded Iris, Iris Germanica ‘Men in Black’ 3-9 2-3 feet Full sun: 6 or more hours a day Purple-black ruffled petals with yellow “beard”; deer resistant; drought tolerant
Black Baccara Hybrid Tea Rose, Rosa ‘Black Baccara’ 5-9 3-6 feet Full sun: 6 or more hours a day Large 3 inch velvet dark red blooms; excellent cut flowers; blooms throughout summer
Karma Choc Black Dahlia, Dahlia ‘Karma Choc’ 8-11 (dig up tubers in colder zones) 2-3 feet Full sun: 6 or more hours a day Perennial; 4-6 inch dark red-brown flowers; long vase life; blooms July-frost
Persian Lily, Fritillaria persica ‘Adiyaman’ 4-8 2-3 feet Full sun: 6 or more hours a day Bulbous perennial; bell-shaped plum-purple flowers; blooms in spring; deer and rabbit resistant
Chocolate Soldier Peony, Paeonia ‘Chocolate Soldier’ 3-8 2-3 feet Full to partial sun: 4 hours of light or more Chocolate-brown flowers; heavy bloomer in late spring; dense and bushy habit
Black Calla Lily, Zantedeschia ‘Odessa’ 8-10 1-2 feet Full to partial sun: 4 hours of light or more Dramatic dark purple spathes (flowers); can grow in shallow water; plants are toxic
Queen of Night Tulip; Tulipa ‘Queen of Night’ 3-8 2-3 feet Full sun: 6 or more hours a day Best planted in groups in fall; purple-black cup-shaped blooms; sturdy stems

How to Plant and Grow Flowers

Although plants that grow from bulbs, such as tulips and Persian lilies, are generally planted in fall, most flowering plants do best when spring-planted. Plant your plants in fertile soil that drains well and in a place where they will get the appropriate amount of sunlight.

To plant your young flowers, unpot them and tease out any encircling roots. Dig a hole that is a little deeper than the root ball and twice as wide. Throw in a shovel-full of well-rotted compost or manure, and place the plant in the center of the hole. Fill in around it with soil that has been amended with compost or manure.

Most flowering plants need watering every day or so when they are first planted until they are established, which may take around a month. After that, monitor them carefully and water if the soil is dry an inch below ground level. Mulching with an organic mulch such as bark chips means you’ll need to water less often.

If you want to give your flowers a boost, fertilize them with an all-purpose, slow-release product designed for flowering plants, following the directions on the package. Generally, you will begin to cut back on fertilizer after July so the plant can prepare for winter.