|Botanicals are often added to soaps. While I don’t have problems with most botanicals there are ways to add these items and few problems.
No sweets: if your fruit item is sugary sweet it will probably cause problems in your soap. If you must add a peach puree to your soap, then use a teaspoon per lb of fats. Your soap will turn out much better with less sugars going into the pot.
No sours: consider adding any juice you like to the mixture but remember the above rule. Lemon juice certainly isn’t sugar sweet, but the pH is too low to be a good addition to your soap.
Juice and tea: If your chosen fruit or vegetable has a high water content (like cucumbers) then consider adding this juiced material to your soap. It will work far better than adding cucumber shreds.
As with any item you desire to add to soap, the first test batch should err on the side of caution. Increase your chosen additive with each successive test batch, until you hit a limit of tolerance. Test batches are certainly usable, and can often be great for test marketing purposes, but failure to make test batches is just asking for trouble.
What plant materials do you like to add to soaps? Which have you considered, but haven’t yet tried? I would like to see your list of items and we can review them together. Send us your comments.