The blue giant primrose (Primula x polyantha) is just one of the color variants of the Pacific giant primrose, which include white, red, and yellow as well. They are revered for being one of the first flowers to bloom in spring. Blue giant primroses grow to about 10 to 12 inches tall and produce 1 1/2 inch wide blue-colored fragrant flowers. Typically grown as herbaceous perennials, blue giant primroses prefer cool, moist growing conditions and rich, fertile soil.
Growing Blue Giant Primroses From Seed
Mix together equal amounts of moist peat moss and fine sand.
Scoop the peat moss and sand mixture into a planting pack. Firm down the sand and peat moss mixture using a teaspoon or your fingers.
Press 2 to 3 of blue giant primrose seeds into the surface of the sand and peat moss mixture in each of the cells. Refrain from completely covering the blue giant primrose seeds with germinating media.
Place the planting pack into a clear, plastic bag. Put the bag into a location which will remain consistently at a temperature of 55 and 65 degrees F for three weeks.There should be a good source of indirect light made available every day for about 8 to 10 hours. The germinating medium is to remain moist at all times, so mist it with water as required.
Transfer the plastic bag containing the planting pack into a location that will stay at 35 to 40 degrees F for a total of six weeks. If you can, place the planting pack into your refrigerator.
Place the planting pack back into the 55 to 65 degree F location after the six weeks has passed, and watch for germination in approximately 10 to 20 days. Provide the same amount of light as specified in step 4 above. Remove the plastic bag once germination occurs and provide about 6 to 8 hours of light a day. Keep the soil on the moist side.
Thin down the blue giant primroses to one seedling per cell. Cut off the spindlier seedlings at the soil line and leave the hardiest appearing seedling. Transplant the blue giant primrose seedlings as soon as they are large enough to handle; about two to three inches in height.
Transplanting Blue Giant Primroses
Dig up the planting area to a depth of about 6 to 8 inches. Make sure the location you choose for your giant blue primroses is in partial shade. If the soil has not been previously amended, work in some peat moss.
Dig planting holes for your blue giant primroses that are the same size as a cell in the planting pack. Push up with your thumb and forefinger to pop out a blue giant primrose seedling from a planting pack.
Set a blue giant primrose seedling into a previously created planting hole. Make sure the blue giant primrose seedling is sitting in the hole at the same level it was growing at in the planting pack. Add or remove soil below the seedling to get the level right.
Scoop in soil in and around the blue giant primrose seedling to fill the hole full. Then, press in the soil around the blue giant primrose seedling.
Pour 1 gallon of water into a watering can. Then, mix into the water 1 tbsp. of 10-55-10 (or similar) starter fertilizer. Water each of the giant blue primrose seedlings until each is well saturated.
About this Author
Katelyn Lynn is a certified holistic health practitioner who specializes in orthomolecular medicine and preventative modalities. She also has extensive experience in botany and horticulture. Lynn has been writing articles for various websites relating to health and wellness since 2007. She has been published on gardenguides.com. She is currently pursuing a Bachelor of Science in alternative medicine from Everglades University.