Freezing the leaves whole doesn't work very well, but if you puree it first you can freeze it for months.
1	Freezing	freeze	VERB	VBG	VerbForm=Ger	7	csubj	7:csubj	Discourse=adversative-antithesis:164->165:1
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	3:det	Entity=(108-plant-giv:inact-cf3-2-coref
3	leaves	leave	NOUN	NNS	Number=Plur	1	obj	1:obj	Entity=108)
4	whole	whole	ADV	RB	Degree=Pos	1	advmod	1:advmod	_
5-6	doesn't	_	_	_	_	_	_	_	_
5	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	7	aux	7:aux	_
6	n't	not	PART	RB	Polarity=Neg	7	advmod	7:advmod	_
7	work	work	VERB	VB	VerbForm=Inf	0	root	0:root	_
8	very	very	ADV	RB	_	9	advmod	9:advmod	_
9	well	well	ADV	RB	Degree=Pos	7	advmod	7:advmod	SpaceAfter=No
10	,	,	PUNCT	,	_	19	punct	19:punct	_
11	but	but	CCONJ	CC	_	19	cc	19:cc	Discourse=joint-sequence_m:165->137:4
12	if	if	SCONJ	IN	_	14	mark	14:mark	Discourse=contingency-condition:166->167:0
13	you	you	PRON	PRP	Case=Nom|Number=Sing|Person=2|PronType=Prs	14	nsubj	14:nsubj	Entity=(11-person-giv:inact-cf1-1-ana)
14	puree	puree	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	19	advcl	19:advcl:if	_
15	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	14	obj	14:obj	Entity=(138-plant-giv:act-cf2*-1-ana)
16	first	first	ADV	RB	Degree=Pos|NumType=Ord	14	advmod	14:advmod	_
17	you	you	PRON	PRP	Case=Nom|Number=Sing|Person=2|PronType=Prs	19	nsubj	19:nsubj	Discourse=same-unit_m:167->165:0|Entity=(11-person-giv:act-cf1-1-ana)
18	can	can	AUX	MD	VerbForm=Fin	19	aux	19:aux	_
19	freeze	freeze	VERB	VB	VerbForm=Inf	7	conj	7:conj:but	_
20	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	19	obj	19:obj	Entity=(138-plant-giv:act-cf2*-1-ana)
21	for	for	ADP	IN	_	22	case	22:case	_
22	months	month	NOUN	NNS	Number=Plur	19	obl	19:obl:for	SpaceAfter=No
23	.	.	PUNCT	.	_	7	punct	7:punct	_
