Black eyed Susan is a species of flowering plant belongs to family of Asteraceae. They are native to central United States. Its scientific name is Rudbeckia hirta. It is named after a Swedish botanist Olaus Olai Rudbeck. Common names of these flowers are brown eyed Susan, golden Jerusalem and golorosia daisy etc.
These are annual flowering plants while some are biennial or perennial. It is a state flower of Maryland. The cut flowers have vase life of 6 to 10 days. It is a low maintenance plant. They can grow well in low watering conditions. These are of good choice for beginner gardeners. These are available in yellow and golden colours mostly; average plant height is from 18 to 72 inches. Their blooming time is late summer to fall. They can grow well unattended but separate the clump after every three to four years otherwise it will result into small plants and small sized flowers.
Susan need full sun and soil of moderate fertility and well drained soil. They will fail to bloom in rich or poorly drained soil. The seeds need sun light to germinate so the seeds are not covered with soil and only pressed down. They can be grown in autumn or winter in unheated greenhouse. Soil temperature higher than 18◦ C ensures good germination of seeds. These can be transplanted in spring season. Replant in moderate conditions. Seeds develop after a month of flowering. To prolong blooming period of plant deadheading is of prime importance. If short and bushier plants are needed wait until the plant grows to height of 12 inches. Then cut 4 to 6 inches below flowering petals. It will promote lateral growth and more flowering. For winter prune the plant back to ground. It will regenerate in next spring season.
Susan can also be propagated by division. Coreopsis, butterfly weed, daylily and clasping coneflowers are good companions for Susan.
Major threats to flower delivery rome black eyed Susan are powdery mildew, leaf spot,
Powdery mildew cause yellowing of lower leaves or brown spots appear on leaves. To avoid spread of disease, remove the leaves in dry conditions. These leaves must be disposed off. Treat infected plant with organic or chemical insect repellents and fungicide. Take special care while watering plants. Wet leaves increases the chances of get infected.
Black eyed Susan is a symbol of justice. Its root wash is used for washing of sores and snake bites. Its infusion is used to treat worms and colds in children. Drops from root extracts are used for earaches. The plant is diuretic.
These are annual flowering plants while some are biennial or perennial. It is a state flower of Maryland. The cut flowers have vase life of 6 to 10 days. It is a low maintenance plant. They can grow well in low watering conditions. These are of good choice for beginner gardeners. These are available in yellow and golden colours mostly; average plant height is from 18 to 72 inches. Their blooming time is late summer to fall. They can grow well unattended but separate the clump after every three to four years otherwise it will result into small plants and small sized flowers.
Susan need full sun and soil of moderate fertility and well drained soil. They will fail to bloom in rich or poorly drained soil. The seeds need sun light to germinate so the seeds are not covered with soil and only pressed down. They can be grown in autumn or winter in unheated greenhouse. Soil temperature higher than 18◦ C ensures good germination of seeds. These can be transplanted in spring season. Replant in moderate conditions. Seeds develop after a month of flowering. To prolong blooming period of plant deadheading is of prime importance. If short and bushier plants are needed wait until the plant grows to height of 12 inches. Then cut 4 to 6 inches below flowering petals. It will promote lateral growth and more flowering. For winter prune the plant back to ground. It will regenerate in next spring season.
Susan can also be propagated by division. Coreopsis, butterfly weed, daylily and clasping coneflowers are good companions for Susan.
Major threats to flower delivery rome black eyed Susan are powdery mildew, leaf spot,
Powdery mildew cause yellowing of lower leaves or brown spots appear on leaves. To avoid spread of disease, remove the leaves in dry conditions. These leaves must be disposed off. Treat infected plant with organic or chemical insect repellents and fungicide. Take special care while watering plants. Wet leaves increases the chances of get infected.
Black eyed Susan is a symbol of justice. Its root wash is used for washing of sores and snake bites. Its infusion is used to treat worms and colds in children. Drops from root extracts are used for earaches. The plant is diuretic.
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