Join a Garden Club
Most communities have a Garden Club with very knowledgable people who know local conditions, have tons of good advice, sometimes will drop by to do a "walk through" and make suggestions for your garden. Great contacts for 'give-aways" - just remembering, giving is a 2-way activity. And many have door prizes at their meetings - I have won blueberry plants, lavendar, daylilies, wild flower seeds - all coming just at the right time. Larger communities also have groups that specialize in one kind of plant, so you can find Dahlia Clubs, Water Gardening groups, etc. Check with your local Parks, Recreation & Culture department for contacts.