but as the summer progresses, their size decreases until, in the fall, growth stops, with no new growth until the next spring.
(the summer; progresses; ) (their size; decreases; T:until, in the fall, growth stops, with no new growth until the next spring) (growth; stops; L:in the fall)
the summer their size growth
progresses decreases stops
T:until, in the fall, growth stops, with no new growth until the next spring
L:in the fall