I Have Had Snowdrops In My Garden Every Year For 3 Years But This Year No Signs Of Any Thin Above The Ground Yet Why..

Question

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Answer 1

Unfortunately, your zone and climate information isn't mentioned. It could be that you are at the edge of where they can survive, and this year may have been a little more harsh than usual.

In the meantime, this article will help you with their care:

https://www.gardeningknowhow.com/ornamental/bulbs/snowdrop/information-about-snowdrops-and-when-to-plant-snowdrop-flower-bulbs.htm