Fireplace ashes can be repurposed in many ways. Here are some ideas from the search results:

• Amend soil and boost your lawn: A sprinkle of wood ashes can be added to your outdoor compost pile or indoor compost bin as one component of your household waste. A small amount with each layer of compost will add nutrients to the end soil or “compost tea.”
• Clean glass and metal: Wood ashes, mixed with a bit of water to form a paste, can be used as a mild abrasive to buff up tarnished metals, clean dirty glass, and even remove adhesives and sticky residue. Apply the paste with a cotton cloth while wearing gloves to protect your skin.
• Make soap: Wood ashes can be used to make soap at home.
• Put out fires: Wood ashes can help put out a fire when a fire extinguisher, soil, or sand is unavailable.
• Boost compost: Wood ash can be added to compost piles to boost their nutrient content.
• Clean stains: Sifted wood ash, mixed with water to form a paste, can be rubbed on stains to remove them.
• Repel insects: Ashes from fire pits, wood stoves, and fireplaces can be used to repel insects.
• Control pond algae: Wood ash can be used to control pond algae.
• Raise soil pH: Wood ash can be used to raise soil pH.
• Absorb odors: Fireplace ashes are useful in absorbing odors.

Its important to note that ashes should be completely cooled before handling and storing them. Also, ashes should not be used on acid-loving plants like blueberries, rhododendrons, and azaleas, as they prefer acidic soil.