Chocolate Scented Daisy Berlandiera lyrata is most impressive and most fragrant when planted in groups.A night bloomer, the flowers offer up their rich cocoa scent in the morning. As the temperature rises the petals close or drop and the fragrance recedes. It dies back to the ground in winter and returns with a larger crown each spring, ultimately reaching about two feet across and about 18 inches high.Like many ray flowers, Chocolate Daisy is an important beneficial insect attractor.

How to Grow Daisy Chocolate Scented Daisy
60- 85 Days to Flower A small plant with an airy habit, Chocolate Scented Daisy (sometimes called Chocolate Flower) makes a nice, informal edging plant, and is most impressive and most fragrant when planted in groups. Although native to the Southwest, it has shown itself to be adaptable to a wide spectrum of conditions. It dies back to the ground in winter and returns with a larger crown each spring, ultimately reaching about two feet across and about 18 inches high. A night bloomer, the flowers offer up their Cocoa scent in the morning and drop their colorful petals each day as the temperature rises. Like many ray flowers, Chocolate Daisy is an important beneficial insect attractor. Diversity is important when trying to attract these helpful insects. Planting many different kinds of flowers provides for the varied tastes of this diverse population. SOW INDOORS 8-10 weeks before the last frost. Cover seed ¼" with soil. Germination is 10-12 days at 68-70ºF. TRANSPLANT outdoors after danger of frost, 8-12" apart. GARDEN HINTS: Daisy's need full sun. Provide ample moisture in the heat of the summer.

When to Sow Outside: Spring after average last day of frost. Soil should be warm.
When to Sow Inside: not recommended
Seed Spacing: 1" to 2"
Days to Emerge: 5 - 10
Thinning: 15" to 18" apart

The concept of Black plants and flowers Garden have always drawn me crazy. I looked for it in the internet however,"black plants wiki" did not help me.Let me try to list down some black flower names which would help people interested in black gardening to make their dream come true.Black in this world usually means very dark purple or red, sometimes a very dark chocolate.
Black plants list:
Aeonium – ‘Zwartkop’
Celosia – ‘China Town’
Oxalis – Oxalis regnelli atropurpurea, Oxalis triangularis, ‘Charmed Wine’
Calla Lillies – ‘Blackjack,’ ‘Hot Chocolate,’ ‘Black Forest,’ ‘Black Pearl,’ ‘Midnight Eclipse,’ and ‘Edge of Night’
Canna – ‘Australia,’ and ‘Tropicanna Black’
Coleus – ‘Inky Fingers,’ ‘Black Dragon,’ ‘Chocolate Mint,’ ‘Dark Chocolate’
Cosmos – ‘Chocolate’
Cranesbill – ‘Cheryll’s Shadow’
Bachelor’s Button – Black Magic and Black Boy
Elephant’s Ear – ‘Black Magic,’
Huechera – ‘Black Beauty,’ ‘Chocolate Veil’, ‘Obsidian,’ ‘Plum Pudding,’ ‘Blackout,’ and ‘Velvet Night’
Bugleweed – ‘Black Scallop,’ ‘Mahogany’
Geranium – ‘Dark Lord,’ ‘Espresso,’ ‘Midnight Reiter,’ and ‘Samobor’
Iris – ‘Black Knight,’ ‘Black Swan’, ‘Old Black Magic’, ‘Ruby Chimes’, ‘Before the Storm,’ and ‘Superstition’
Dahlia – ‘Happy Single’ series, ‘Bishop of Llandaff,’ and ‘Fascination’
Scabiosa – ‘Ace of Spades,’ and ‘Chile Black’
Sunflower – ‘Moulin Rouge’
Sweet Peas – ‘Black Knight,’ and ‘Wiltshire Ripple’
Sweet Potato Vine – ‘Blackie,’ ‘Sidekick Black Heart,’ and ‘Sweet Caroline’
Violas – ‘Black Magic,’ ‘Bowles Black,’ and ‘Molly Sanderson’
Cabbage – ‘January King’
Eggplant – ‘Black Beauty,’
Kale – ‘Black Tuscany,’ ‘Cavolo Nero’
Lettuce – ‘Lollo Rossa, ‘Merlot,’ ‘Really Red Deer Tongue,’ ‘Majesty,’ ‘Marshall,’ and ‘Blackhawk’
Tomatoes – ‘Black’, ‘Black Cherry’, and ‘Black Plum’
Basil – ‘Dark Opal, ‘Purple Ruffles,’ ‘Red Rubin,’ ‘Osmin Purple,’
Radish – ‘Black Spanish’