V Olších

V Olších is a small but ecologically significant nature monument located in the cadastral territory of the village of Záhoří u Miličína, right on the border between the Central Bohemian and South Bohemian regions of the Czech Republic. Covering just under 4 hectares at an elevation of 547–560 meters above sea level, the site has been under legal protection since January 1, 1972. It falls under the oversight of the Nature and Landscape Protection Agency of the Czech Republic (AOPK ČR), while day-to-day care is handled by the local conservation group ČSOP Vlašim.

Why is this site protected?

The reserve was established to safeguard one of the richest populations of spring snowflake (Leucojum vernum) in the Central Bohemian region. Every March, thousands of these white, bell-shaped flowers bloom across the marshy meadows and alder groves, creating a spectacular but short-lived carpet of white. Picking the flowers is strictly forbidden and enforced by police and nature protection rangers, so visitors are asked to admire them without disturbing the plants.

What does the landscape look like?

V Olších is a wetland area shaped by a stream and natural springs that keep the soil consistently moist for most of the year. A defining feature of the landscape is the alder trees growing on exposed, stilt-like root systems — the result of natural erosion and decomposition of the forest floor over time, giving the woodland an unusual, almost fairy-tale appearance. Ferns are abundant in the undergrowth alongside the alders, and together they form a mosaic of wetlands and damp meadows.

What wildlife lives here?

The moist habitat is favorable for amphibians, including the common toad, which inhabits the reserve. To support amphibian breeding, ČSOP Vlašim maintains small artificial water pools where frogs and toads can lay their spawn and where tadpoles can develop safely.

How is the site managed?

Conservation of V Olších relies mainly on minimal human intervention. Staff and volunteers from ČSOP Vlašim deliberately avoid standard forestry practices, allowing natural processes of wood decay and decomposition to continue undisturbed. Their main tasks are periodically cutting back encroaching shrubs that threaten to overgrow the open, marshy areas, and monitoring the water regime, which is essential for the long-term survival of the spring snowflake population.

Frequently asked questions

When is the best time to visit V Olších? March is the ideal time, when the spring snowflakes bloom and cover the wet meadows in a distinctive white carpet.

Can visitors pick the flowers in the reserve? No. Picking spring snowflakes is prohibited and monitored by police and nature protection authorities.

How large is the protected area? The reserve covers just under 4 hectares and sits at an elevation of 547–560 meters above sea level.

Since when has the site been protected? It has held nature protection status since January 1, 1972.

What animals live in this reserve? The wet environment supports amphibians such as the common toad, for which artificial breeding pools are maintained.