Flush for last two weeks or not yet?

The buds can ripen for what looks like another 3 weeks. But your plant might be finished in 2 weeks. I'd begin flushing in a week. Canna is very easy and quick to flush. #1 recommended synthetic fertilizer. Some good stuff. Keep a close eye on the trichromes as it matures.

Hi. I only flush my autos for a week. Since I don't feed them as heavily as photo periods. But you can definitely give them another week, probably even two, depending on how badly you want it. The longer it ripens on the plant, the less ripening in the jar. It also depends a bit on what kind of high you want. The earlier you harvest, the more heady it is; the later you harvest, the more body-heavy it is. Best regards!