A powdered plant sample is obtained from a material mostly after drying and pulverizing, say a plant material (leaves, bark, etc). An organic solvent extract is obtained when a sample (e.g. plant material) is macerated (plant material is kept in contact with the solvent in a stoppered container for a given period with repeated agitation until soluble matter is dissolved at room temperature for a period of 3 days (Handa et al., 2008)). So what is the point of your question?

When you use the organic solvent extract for fractionation with different polarity solvents, the main problem is the solubility of the extract in water. As non-polar compounds are not fully soluble in water, which may cause yield loss of the extract.

In the case of fractionation from powdered plant samples (can use successive extraction), you can overcome this problem.

I do agree with Prithvit