How do you recommend cleaning algae off of stone benches?

Ah, the humble stone bench. A silent witness to countless mornings, conversations, and sunsets. But lately, you've noticed an unwelcome guest: a slick, green film of algae making itself at home. Don't despair! As your bench's companion, I'm here to guide you through reclaiming its dignified, moss-free stature. The key is to be firm yet gentle, like persuading an old friend to change a bad habit.

First, let's have a heart-to-heart with your bench. Assess the situation. Is the algae a thin, new layer or a thick, established mat? For a light case, a simple conversation might suffice. Create a potion of one part white vinegar to one part water—a solution algae finds terribly rude. Apply it generously, let it sit for 15 minutes to air its grievances, then scrub with a stiff-bristled brush (never metal, as it can scratch!). Rinse thoroughly with water. For more stubborn tenants, a stronger word is needed. Mix oxygenated bleach (a kinder, gentler bleach alternative) with water as directed. It attacks the algae without harming the surrounding plants or the stone's soul as harshly as chlorine bleach would.

Now, for the deeply settled, mossy types, we may need to bring in the waterworks. A pressure washer can be a powerful ally, but use it on the lowest setting. Think of it as a firm but controlled shout, not a scream. Hold the nozzle at an angle and keep it moving to avoid etching the stone's surface. Always test any method in a small, inconspicuous area first.

The final, most crucial step is prevention—changing the environment so algae doesn't want to return. Ensure your bench gets more sunlight and airflow if possible. Consider applying a breathable, penetrating stone sealer after a deep clean. This acts like a protective cloak, making it harder for algae spores to take root. With these caring steps, your stone bench can return to being a clean, welcoming perch for many more years of quiet contemplation and shared laughter.