Quality evaluation should focus on color, cut size, and moisture content. High-quality hibiscus should exhibit a deep, vibrant burgundy or ruby red color; a brownish tint often indicates old stock or poor drying. For wholesale, you must choose between Whole Calyces (Grade A), which are best for premium retail, and Fine Cut/Siftings, which are ideal for tea bags. Ensure the moisture content is below 12% to prevent mold during long-term storage and transit. Additionally, check for extraneous matter (sand, stones, or hair), which should be less than 1% in premium batches.