Hi Organic,

Did you save receipts?

Recycled plants vary in price.

I used to work at a retail plant store that sold recycled plants. 5-15' plants/trees started at 10.00. The most expensive sold for 25.00 or so.

Happen to know which E. latea you donated? Was it crested?

Most nurseries sell small to mid-size plants. You might be able to find prices at landscaping sites.
Their plants are usually large and sell at higher prices.

Google landscapers.

Sorry I couldn't be more help. Toni

PS: Don't want to sound like the voice of doom, but I wouldn't count on much under donations, on new tax forms.

You can estimate their value and deduct that amount but only if you are going to itemize on your tax return.
Was the garden you donated the plants to for the public's enjoyment or a private foundation?