Optimize legibility of the club name (Example: Mössinger Amtsblatt [a German public journal], issue 41-2013, page 26 – artifacts were unfortunately introduced like in all logos)
Increase recognizability of the tree with Oeschbergschnitt (one large tree instead of three small ones, reduced detail, increased spacing)
Fix typography (consistent line spacing and indents, “Gartenbauverein” instead of “Gartenbau Verein” with missing hyphen or incorrect space)
Include “e. V.” in the logo, which means “registered association” in Germany (German Wikipedia article)
Use the green hue that is already present on the association building
Create scalable vector graphics to avoid compression artifacts like in the original logo and to allow using the logo in any size