When do fall leaves release their nutrients?

[Woodznutz]

Scientists say it happens in the fall. However, I believe it happens mostly in the spring when the weather warms and the leaves really begin to disintegrate. What say you?

 

[Meister]

I say in the fall, when the leaves turn, and fall with their nutrients. The benefits are shown in the spring from
the decomposed leaves.

Also, Woodznutz , shouldn't you have a linked source to your claim?

 

[Woodznutz]

I say in the fall, when the leaves turn, and fall with their nutrients. The benefits are shown in the spring from
the decomposed leaves.

Also, Woodznutz , shouldn't you have a linked source to your claim?

My own observation is my source. Fall leaves basically remain whole until spring, especially oak leaves. Decomposition virtually stops when winter sets in.