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        Alibaba.com offers 3,050 giant knotweed products. About 67% of these are herbal extract, 1% are other organic chemicals, and 1% are other chemicals. A wide variety of giant knotweed options are available to you, such as leaf, seed, and bark. You can also choose from cutter, synthetic flavour & fragrance, and acidity regulators. As well as from free samples, paid samples. There are 3,021 giant knotweed suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Canada, which supply 99%, 1%, and 1% of giant knotweed respectively. Giant knotweed products are most popular in North America, Western Europe, and Domestic Market. You can ensure product safety by selecting from certified suppliers, including 1,149 with ISO9001, 861 with Other, and 513 with GMP certification.
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