To cold stratify your seeds, put them in an airtight container with some damp perlite, which you can find at the Home Depot. Miracle Gro Perlite. Trust me on this one. I once scattered seeds all over my flowerbed in mid-spring and waited for the magic to happen. To sow, fill each pot with potting mix.
Using a spray bottle, water the newly planted seeds and keep the soil moist until germination, which should happen in two to three weeks. When the plants have two to three sets of true leaves, thin to one plant per pot. Wait until two weeks after the average last frost date in your area before you transplant them out to the garden. To transplant, dig a hole in a location that receives six to eight hours of sun daily and set the biodegradable pot inside.
Backfill with soil and water thoroughly. In Zones , you can sow these seeds outdoors two weeks after your average last frost date — after you have cold stratified them, as described above.
But keep in mind that if you live in Zones 7 and up, your larkspur would appreciate a couple hours of afternoon shade to keep cool during hot summer afternoons. Water thoroughly and keep the soil moist until germination, which will occur in two to three weeks.
In early September, sow seeds outdoors according to the instructions above. The seeds will germinate and grow steadily for a month or so until the coldest weather hits. If temperatures drop below freezing, the plant may turn brown and look dead. In early spring, the plant will grow new green leaves and emerge strong and tall, blooming through mid-spring, and into early summer for a repeat show with regular deadheading.
As you might guess from its wild origins, larkspur can thrive in a wide soil pH range, but anything between 5. If you do find that the stalks need support, drive a wooden stake down into the soil three inches behind the flower stalk and affix the stalk to the stake with a piece of stretch tie.
When the plants have two to three sets of true leaves, fertilize them with a balanced NPK fertilizer according to package instructions. Once or twice a week, water the plants with an inch of water, depending on the amount of rainfall. Before you water, check the moisture level by sticking your finger into the soil about one inch down. If you feel moisture, hold off on watering for another day or two. You want to keep them moist, but not waterlogged. Also, take the time to lift the leaves and water underneath them instead of irrigating from above.
This will help keep them dry and disease-free. If you find any signs of pests or disease on the stalks, dispose of them far away from your thriving garden, or burn them. You can also prune a few spikes from each plant just after they bloom, and set the spikes in a vase for some indoor cheer. Learn more about extending the life of cut arrangements here. Are you looking for a baby-blue bloom to raise your spirits every morning?
Find seeds in a variety of packet sizes available at Eden Brothers. True to their name, these purple flowers are the perfect bloom to set off white and blue-hued larkspur in your garden. You can find seeds available at Eden Brothers.
Looking for a classic Consolida to adorn your yard or garden? This rocket larkspur mix brings a delightful mix of color. You never know what shade a plant will be until it blooms along with its sisters in a breathtaking display of pink, white, and lilacs spires.
Rocket Mix. Even better, rocket larkspur shoots up to six feet tall. Plant against a front-facing wall or fence for a dazzling show of color. 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 cattle. Plant Height: 3' - 5' Plant Propagation: Larkspur are started from seed.
Directly sow Larkspur seeds into your flower garden after all danger of frost. In NC it is found mostly in the mountains in clearings or the edge of woodlands. This plant grows up to 6 feet tall and grows from rhizomes.
It prefers cool summers and doesn't do well in high humidity. The tall flowering stem has many blue to purple and occasionally white flowers in clusters from July to Sept. Tall Larkspur prefers fertile moist well-drained soils in full sun. It hot summer areas it will appreciate some afternoon shade. Use in a cottage garden, borders or native gardens. Looks great in groups or mass planted. Diseases, Insects and Problems: Diseases are powdery mildew, botrytis blight, leaf spots and crown rot.
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