Utilizing Coffee Flowers in the Specialty Coffee Industry: An Untapped Potential
Across coffee farms in the Bean Belt, the fragrant white blossoms of coffee flowers mark a pivotal stage in the growth cycle of coffee plants. These flowers help farmers assess the potential productivity of their crops for the season and prepare for the months ahead.
The blooming season varies depending on geographic location and climatic conditions. However, one thing is certain: the flowers will eventually fall after their peak blooming phase.
As many farmers look for ways to increase income by repurposing coffee byproducts, coffee flowers have the potential to become a valuable resource.
How Do Coffee Flowers Bloom?
Coffee plants typically begin to flower three to four years after planting, with the blooming phase lasting for about two to three months. Each bud can produce up to four flowers, clustering densely along the stems.
Lívia Macarini Pereira, an agronomic specialist at Daterra Coffee, highlights the essential role of the flowering stage in the coffee plant’s biological cycle.
“Arabica coffee plants are self-pollinating, but robusta plants require cross-pollination facilitated by insects,” she explains. “The flowers attract insects with their colors and nectar, which aid in the pollination process.”
Coffee plants require a substantial intake of water before flowering begins. “The blooming phase often starts after heavy rainfall,” says Brandon von Damitz, co-founder of Big Island Coffee Roasters.
The ideal temperature range for the flowering process is between 19°C and 24°C, ensuring even and healthy growth.
What Happens After the Flowers Fall?
Uniform flowering is crucial for ensuring cherries ripen at the same rate, improving quality and reducing the time required for harvesting.
Once flowers wither, they naturally decompose on the ground, becoming nutrient-rich compost. This process helps nourish the soil and supports healthy plant growth.
How Can Coffee Flowers Be Repurposed?
Amid the industry’s efforts to reduce waste, coffee flowers have emerged as a potential resource for repurposing.
Coffee Blossom Tea and Herbal Beverages
Brandon shares his experience producing coffee blossom tea at Big Island Coffee Roasters. “The tea has a delicate, sweet flavor with floral notes,” he says. The process involves harvesting flowers shortly after wilting and drying them.
Integration in Post-Harvest Processing
Lívia mentions a 2018 experiment at Daterra that combined coffee petals with coffee cherries under different oxygen conditions. The results enhanced flavor complexity, but the process disrupted the plant’s reproductive cycle.