How to Grow Larkspur Flowers
Annual, Consolida Orientalis
Most likely, you first saw the tall and stately spikes of Larkspur growing
in your grandparents flower garden. When in bloom, these big flower spikes
are lovely in the garden and indoors in vases. Colors include light and dark
pink, blue, rose, lavender and white.
Larkspur are members of the Delphinium family. There are many varieties of
Larkspur, so it should not surprise you that they range in height from one
to seven feet.
Best of all, tall growing Larkspur plants produce flowers that burst into
bloom in the spring when many other flowers are still weeks away.
Did you Know? Larkspurs can be poisonous to some animals, most notably
Plant Height: 3' - 5'
Larkspur are started from seed. Directly sow Larkspur seeds into your flower
garden after all danger of frost.
Sow seeds early in the season and cover lightly with 1/8" of garden soil.
Space them 4 inches apart and thin seedlings to 10-12 inches apart.
Larkspurs are Rhizomes. You can separate the rhizomes of established plants
and replant in new areas.
Days to Germination: 10 - 15
How to Grow Larkspur Plants:
Larkspur plants like full sun to partial shade. They are very easy to grow
and grow rapidly. They do well in average soils and in cool weather. The
soil needs to be kept moist to feed their quick growth.Water them during
dry periods, once or twice per week. Add a general purpose fertilizer once
a month until after they have bloomed.
Cut blooms just before they peak. Place in vase and arrange with other flowers,
or alone by themselves.
Once your Larkspur plants are established, they will grow well until the
first frost. Larkspur are annuals and highly susceptible to frost.
Flowers Bloom: Summer thru Fall
Insect and Disease:
Fungal disease is common, most notably Sclerotium rot which yellows leaves
and wilts plant. Larkspur is also affected by mildew. Treat affected plants
immediately with a general purpose fungicide. Remove seriously diseased plants
to keep the disease from spreading.
Insect problems are less frequent. Organic or chemical insect repellents
are effective against most pests.
Also see Delphinium
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