Isoetes alpina thrives in consistently moist to waterlogged conditions. Maintain a water level that submerges the substrate, simulating its natural boggy environment.

Avoid letting the soil dry out completely, as this can stress the plant. Regular watering is crucial, especially during warmer months.

Pruning Isoetes alpina is generally minimal. Remove any dead or yellowing leaves by gently pulling them away from the base. This helps maintain the plant's health and appearance.

Avoid cutting healthy foliage as it contributes to the plant's energy production.

Propagation is typically achieved through division of established plants. Carefully separate smaller plantlets from the parent plant during repotting. Ensure each division has a healthy root system.

Alternatively, spores can be collected and germinated under controlled, moist conditions.

Repotting Isoetes alpina is usually only necessary when the plant outgrows its container or when the substrate needs refreshing, typically every 2-3 years.

Use a heavy, water-retentive substrate like aquatic soil or a mix of sand and peat moss. Ensure the pot has drainage holes.