because otherwise it's too it gets if you start them when it's cooler in the spring then it gets too hot in the summer
( because ( otherwise ( it ( 's ( too ( it ( gets ( if ( you ( ( start them ) ( when ( it ( ( ( 's ( cooler ( in ( the spring ) ) ) ) then ) ( it ( gets ( too ( hot ( in ( the summer ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )
(ROOT (SBAR (IN because) (S (ADVP (RB otherwise)) (NP (PRP it)) (VP (VBZ 's) (ADJP (RB too) (SBAR (S (NP (PRP it)) (VP (VBZ gets) (SBAR (IN if) (S (NP (PRP you)) (VP (VBP start) (NP (PRP them)) (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBZ 's) (NP (NP (JJR cooler)) (PP (IN in) (NP (DT the) (NN spring)))) (ADVP (RB then)) (SBAR (S (NP (PRP it)) (VP (VBZ gets) (ADJP (RB too) (JJ hot) (PP (IN in) (NP (DT the) (NN summer)))))))))))))))))))))
It will get too hot in the summer if you start them in the spring.
( It ( ( will ( ( get ( too ( hot ( in ( the summer ) ) ) ) ) ( if ( you ( ( start them ) ( in ( the spring ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD will) (VP (VB get) (ADJP (RB too) (JJ hot) (PP (IN in) (NP (DT the) (NN summer)))) (SBAR (IN if) (S (NP (PRP you)) (VP (VBP start) (NP (PRP them)) (PP (IN in) (NP (DT the) (NN spring)))))))) (. .)))