I want to plant a tree or flower that represents unity. My husband and I are making a fresh start. Any ideas?
Plant a fruit tree. The fruits of your labor, etc. There are many bible references to fruit and a strong marriage needs God, IMO. Matthew 7:18A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
I think that it is awesome for you to have a fresh start. Some of the plants that you can consider planting include acacia, ambrosia and roses. You can get some more ideas on http://www.800florals.com/care/meaning.asp.