Black pine sap

froufrou

Does the sap become more liquid when it comes out of dormancy?

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nip

A cut/wound will "bleed" more sap in the growing seasons; if thats what you're asking.

Asus101

Well, I think that most thick liquids flow better when they warm up. Cool them down and they dont flow as well.

I could be wrong though.

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froufrou

Thanks I guess I mean is the sap less viscous (less thick) during the growing season compared to when dormant. Like if there's a wound and sap is flowing, can I tell if it isn't dormant if the flow is less viscous.

I guess temperature plays a part as you said. Thanks.

Glider

I think I know what you mean. Yes, when actively growing there will be a higher water content to the sap, which with therefore be more dilute and less viscous. The sap of pines is like antifreeze and protects them from tissue damage in freezing temperatures so in winter, the lower water content further reduces the risk of cell damage by freezing.

However, the tree will bleed more in its growing season more because sap is more actively moving than because it's less viscous.

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