Hang it early and let it work: steady thrips protection for weeks.

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Thrips damage usually shows up after the population is already growing. Amblyseius cucumeris (also known as Neoseiulus cucumeris) slow-release sachets get ahead of that. Each sachet is a small breeding colony that you hang in the plant canopy, and it keeps sending out predatory mites for 2–4 weeks, even in cool spring weather.