How does the process of Freeze drying work?

 1. Harvesting the Flowers

  • Fresh flowers are picked at the peak of their bloom to ensure the best colour and        quality of the petals.

• Common flowers used for freeze-dried petals include roses, hydrangea, and delphiniums, though many varieties can be preserved this way.

2. Freezing the Petals

 • The fresh petals are first spread out on trays or in containers and quickly frozen at    very low temperatures (usually below -40°C or -40°F). The rapid freezing helps            preserve the structure and prevent damage to the delicate tissues of the petals.

3. Sublimation (Freeze-Drying)

  • After freezing, the petals are placed in a vacuum chamber where the surrounding      pressure is lowered.

• This step allows the ice within the petals to sublimate, which means it transitions directly from a solid (ice) to a gas (water vapour) without becoming liquid. This is the key to retaining the petals’ shape and colour, as it prevents them from wilting or collapsing.

• During this phase, the water content is slowly removed while maintaining the integrity of the flower petals.

 4. Post-Drying

  • Once the sublimation process is complete, the petals are carefully removed from        the freeze-dryer and inspected for quality.

• The freeze-dried petals are then stored in airtight containers to protect them from moisture and prolong their shelf life. These petals can last for months, as long as they are kept in dry conditions.

Green Your Event has a beautiful range of freeze-dried rose petals available. Browse our store and make your wedding or celebration a sustainable one.

https://greenyourevent.com.au/collections/freeze-dried-rose-petals