COMBINE CONSISTENCY + INCONSISTENCY
Imperfection is the foundation of your style. Yes, it’s true. Let me explain.
When drawing a landscape plan we need some consistency (measurements + design details), but it’s also nice to celebrate you as a designer and artist when graphically communicating those ideas. This concept of pairing consistent drawing methods with your drawing inconsistencies (imperfections) is what evolves into your personal graphic style. When you accept these imperfections it's more relaxing and fun to draw, plus over time your style emerges more and more.
To create the consistent part of your drawings..use tools!! Don’t be afraid to use things like straight edges, rulers, circle templates, and a pencil to layout the initial bones of your drawing. Drafting tools are awesome and give us the guidance we need to measure and layout our garden vision. If you’re drawing digitally, it’s important to also use tools in your software program to create circles and lines initially.
Now comes the cool part, the inconsistency, your flair, your style. Now that you’ve drawn your light pencil lines with a fancy drafting tool, you can use a pen or darker/softer pencil to free-hand the final element over that structure. The pencil line (using a tool) gives your drawing that consistent structure, but when you trace it free-hand, your style shines. Your drawing still looks professional, plus now has your character.