How to grow Eryngium Seeds
Eryngium is a striking ornamental plant that prefers well-drained soil and can take patience to establish, often flowering in its second year after sowing.
When to Sow Eryngium Seeds
If starting indoors, sow eryngium seeds in late winter to early spring, about 8–10 weeks before the last frost date in your area.
Germination
Germination for eryngium seeds can be erratic. Typically it takes 2–3 weeks, but it could be anywhere between 5–90 days.
Direct Sowing Outdoors
For direct sowing outdoors, wait until after the last frost date has passed and the soil has warmed up.
Soil Preparation
Prepare a well-draining, sandy or loamy soil mix for planting. Eryngium plants prefer slightly alkaline soil with good drainage.
If starting indoors, fill seed trays or small pots with the prepared soil mix and moisten the soil before sowing the seeds.
Sowing Seeds
Press the seeds lightly into the soil and cover lightly with a thin layer of soil or sand to help keep them in place.
Watering
Water the seeds gently to moisten the soil. Avoid overwatering, as eryngium seeds may rot if the soil becomes waterlogged.
Light & Germination Conditions
Place the seed trays or pots in a warm, bright location with indirect sunlight.
Transplanting
Once the Eryngium seedlings have developed several sets of true leaves and the danger of frost has passed, they can be transplanted into the garden.
Maintenance
Water the Eryngium seedlings regularly, especially during dry periods. Once established, Eryngium plants are drought-tolerant and require minimal maintenance.
Blooming
Even with proper care, it is likely that Eryngium plants will wait to flower until their second year after sowing. Don’t worry that you have done something wrong; just give them a little patience.