Coreopsis flower seeds harvesting preservation
**Coreopsis (Other Middle Names): Basal Leaves, Coreopsis compositae**
**Family:** Asteraceae (formerly Compositae)
**Origin:** United States
**Botanical Description:**
Coreopsis is an annual herb that typically grows to a height of 40–50 cm. It produces flower heads containing achenes—small, black seeds without a pappus. The flowering period usually occurs from August to October, with the seeds maturing during this time.
**Seed Harvesting:**
The main part harvested is the flower head (capitulum) of the plant. From August to October each year, fully matured inflorescences are cut and dried. They are then stored in a dry, cool place. After drying, the seeds are collected and mixed to ensure uniformity.
**Seed Grading:**
Before packaging, the seeds must be graded to ensure purity, proper moisture content, and absence of foreign materials. The first-grade seeds should have a germination rate of at least 98%, while second-grade seeds must maintain a minimum of 95%. Third-grade seeds should not fall below 92% germination. If seeds of different grades are used together, a deviation of up to 5% is acceptable. Over time, as storage duration increases, the germination standards should be adjusted accordingly.
**Packaging:**
Due to its relatively large seed size, Coreopsis is packaged in moisture-proof paper bags for internal use and printed paper bags for external packaging. Care must be taken to avoid mixing seeds of different grades during the process. For wholesale, the standard package size ranges from 300 to 500 grams. Retail packages are smaller, typically between 0.1 and 0.2 grams per unit.
**Storage Management:**
To maintain quality, Coreopsis seeds should be stored in a dry, dark, well-ventilated area with a temperature between 10°C and 15°C. Proper storage conditions help preserve their viability over time.
**Storage Duration:**
When stored under optimal conditions, Coreopsis seeds can retain a high germination rate for 1 to 2 years. This makes them suitable for long-term stockpiling, especially when planning for seasonal planting.
**Gardening Applications:**
Coreopsis is a popular ornamental plant known for its vibrant green foliage and bright yellow flowers. It thrives in a variety of garden settings and is often used in mass plantings or as border plants. Its hardiness and easy maintenance make it ideal for both beginner and experienced gardeners.
**Supply Recommendations:**
Sowing of Coreopsis is typically done between March and April. To ensure availability, seeds should be ordered in advance. For off-season storage, unsealed seeds should be kept in a controlled environment. If seeds have been stored for more than one year, clear instructions should be provided before delivery to ensure they remain viable and suitable for planting.
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