Sea Holly Not Blooming

Question

No sign of any blooms

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Answer 1

There are a few reasons why this could be the case. It may not be old enough: They will not flower during the first, and sometimes second year.

They are too compact: This is one of the reasons that I believe that the plant is not flowering. This plant has a long taproot and will not be suited for container life. Unfortunately, they do not transplant well, either.

Too much nutrients: This plant thrives in poor, sandy soils. Nutrient rich soils will cause stretchiness and no flowering.

Too much moisture: These plants cannot tolerate wet or compact soils, at all.

This article will give you more information on the requirements of Eryngium:

https://www.gardeningknowhow.com/ornamental/flowers/sea-holly/sea-holly-flowers.htm