Go to web site of Kew garden of England.
I’m a gardener and I really like this site:
For specific plant information click on ‘Guides and Information.’
Hope this helps!
Have you considered looking at blogs written by gardeners? They are usually (but not always!) amatures, but there are very talented individuals out there who could and would be happy to act as an online “mentor”.
Another good resource would be a county extension office, or look at the area arboretums for classes in gardening.
This is a self-serving post.
I have a small blog where I try to address simple questions about gardening. You can find it at:
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If you think its good, check back. If not, thanks for looking.
Bug Doc (TheSeasoned Gardener)