These estimates for how long Sisyrinchium powellii takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.
Days to Germination How long does it take Sisyrinchium powellii to germinate?
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Days to Transplant How long until I can plant out Sisyrinchium powellii?
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Days to Maturity How long until Sisyrinchium powellii is ready for harvest / bloom?
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Total Growing Days How long does it take to grow Sisyrinchium powellii?