These estimates for how long Oenothera heterantha 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 Oenothera heterantha to germinate?
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Days to Transplant How long until I can plant out Oenothera heterantha?
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Days to Maturity How long until Oenothera heterantha is ready for harvest / bloom?
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Total Growing Days How long does it take to grow Oenothera heterantha?