COWSLIP PRIMROSE Primula Veris
Probably the easiest primula to grow, Cowslip Primula quickly fill a shady spot with bright, almost-glowing yellow flowers! This primula is extremely hardy, and tolerant of variable soil types. We grow these plants in an uncommon place for primula, in dry sandy shade, and they thrive. We do give them an occasional light watering in periods of drought, though we have never lost any plants, and they come back better and better each season. Plants will gently form colonies if they are allowed to self seed. An excellent plant for difficult shady areas.
Location: Shade or part shade
Hardiness zones: 3-8
Bloom time: Spring and early summer
Note: This plant species is known to cause dermatitis in some individuals.
Seeds per pack: 20
Germination: As with many perennials, these seeds can benefit from a period of moist cold to help them break dormancy. This is done by giving them a cold 'winter' period (artificial or natural), and then a warming to simulate 'spring', and time to grow! Here's how this can be done:
Obtain a planting container that has holes in the bottom for excess water to drain. Place the seeds on the surface of your growing medium, and water. Place your container in a cold area (but not freezing, perhaps a refrigerator) for 4-6 weeks. Once the cold period is completed, place the container at room temperature for them to germinate. Be sure to keep the soil moist during this entire germination period. Seedlings will sprout a few weeks, or occasionally several months, after the warming period.
Alternatively, these seeds can also be planted outdoors in fall, winter, or early spring, while temperatures are still cold (but ground is workable) to germinate naturally in spring. Be sure to mark the area where you planted them, and that the soil is consistently moist.