The extract of leaves is made for what purpose? The stability of the products has to be carried out to find out their activity at different intervals under variable conditions.
The question is not quite clear,any way, you mean Dichroromethane NOT dimethanechloride?.The used solvents and temp. depend on What components you want to extract.If volatile,should be at room temp. ( or steam distillation).In general start with nonpolar solvent n-hexane or petroleum ether then increase the polarity ethyl acetate,ethanol or methanol,methanol/water 70:30. Using TLC to know the no. of comp. in each fraction.