The delphinium plants are a striking flowering perennial. There are some varieties that can grow up to eight feet tall. The delphinium plants produce spikes of stunning small flowers in blue, violent, deep indigo, pink, and white. The delphinium plants are popular for cut flowers and cottage style gardens, although they do require a good deal of work. Continue reading to learn how to grow delphinium from seed.


How to Plant Delphinium Seeds Outdoors

The delphinium plants actually are known for being high a maintenance plant, nevertheless they reward you with stunning flowers. Knowing how and when to sow the delphinium plant seeds will set you on the right path to growing tall, healthy, flowering plants. Germinating the delphinium plant seeds really requires a cold start so put the delphinium seeds in the refrigerator for about a week before planting. Start the delphinium seeds indoors about 8 weeks before the last frost of spring. On the other hand, you can sow the delphinium seeds directly in flower beds in early summer.  

If you are sowing outside, you may want to let the delphinium seeds germinate first. Put the delphinium seeds on a wet coffee filter and fold in half so that the delphinium seeds are inside. Place this in an out of the way place but not necessarily in the dark. In about a week you should see little roots emerging. Whether you’re sowing the delphinium seeds indoors or out, cover the delphinium seeds with about an 8 of an inch of soil. Keep the soil moist and at a temperature of about seventy to seventy-five degrees Fahrenheit.

Furthermore, the delphinium seed planting should lead to seedlings in about 3 weeks. Make sure the delphinium seedlings get plenty of light at this point if indoors. The delphinium seedlings should have 2 or more pairs of true leaves before they are actually transplanted outdoors. When the delphinium seedlings are ready for transplanting, harden off the delphinium seedlings by putting the seed trays outside in a sheltered area for about a week. You can plant them in the flower bed with a spacing of at least eighteen inches between each one. The delphinium plants are a heavy feeder so it’s a good idea to add compost to the soil before putting in the delphinium seedlings. 

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