How to grow Eryngium Seeds

Sowing Time: If starting indoors, sow your eryngium seeds in late winter to early spring, about 8-10 weeks before the last frost date in your area. 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 or 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.

Germination: Place the seed trays or pots in a warm, bright location with indirect sunlight. Germination for eryngium seeds can be erratic. Typically it takes 2-3 weeks, but could be anywhere between 5-90 days.

Transplanting (if started indoors): 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 so don't worry that you have done something wrong, just give them a little patience!