Various extraction methods are available for various phytochemical groups. If you aren't looking for any specific one, a general crude extraction method could be as follows:

Crush sample, dry or still fresh, immerse in methanol for about 7 hours with continuous stirring. Then filter off the residues. The remaining solution will contain a very wide range of phytochemicals which you can either use as is, or concentrate by drying (best to use rotor vaporator or lymphorizer).

If you are interersted in specific classes of compounds, then you can take it from this stage and dissolve in various solvents

I agree with Dr. Priyankar.... The best extraction method depends on your target Phytochemical group and research objectives. This would lead you to your choice of solvent as extractability of solvents differ.

It depends the nature of plant like Garlic, active ingredients can be extracted by use of ethanol as tincture while some can be extracted boiling in water like bottle brush

Check this link is useful

https://www.motherearthliving.com/health-and-wellness/herbal-extracts

Kind regards

This is useful

https://www.soci.org/-/media/Files/...Mar.../Frank_Waimer.ashx?...

regards

You may also Our recent paper useful.

https://www.researchgate.net/publication/324532083_General_Extraction_Isolation_and_Characterization_Techniques_in_Drug_Discovery_A_Review

Best

Generally, it should depend on the nature of your target compounds and objectives

Which depened on the composition of plant and ways solvent and give the active ingredient.