Outdoor stone sculptures are vulnerable to biological growth like algae, moss, and lichen, which can degrade their appearance and structural integrity over time. To protect your stone artwork, follow these proven methods:

1. Regular Cleaning: Use a soft brush and mild detergent to scrub away dirt and early signs of growth. Avoid harsh chemicals that may damage the stone.

2. Apply Protective Sealants: Use a breathable, water-repellent sealant designed for stone surfaces. This creates a barrier against moisture, a key factor in biological growth.

3. Control Surrounding Vegetation: Trim nearby plants and trees to reduce shade and humidity, which encourage moss and algae.

4. Use Natural Remedies: A mixture of water and white vinegar (1:1 ratio) can help remove light biological growth without harming the stone.

5. Install Proper Drainage: Ensure water doesn’t pool around the sculpture, as stagnant water accelerates growth.

For severe infestations, consult a professional conservator to avoid damaging delicate stonework. With consistent care, your outdoor sculptures can remain beautiful for decades.