Angie, the Territorial Seed Co. and the planner rina mentioned are the same and really offer a lot of great information. For example, It has plant descriptions, spacing, companion planting, nutrient needs. The plant guide feature is a color chart showing when to plant seeds, when to plant in the ground, and when to harvest. Garden features like low tunnel will change the plant dates to show how much it might extend your growing season including plenty of space to make notes. It will alert you of plant rotation based on the previous year garden layout. It really is worth looking into with a 30 day trial period. If it isn't worth the cost, you don't have to buy it. I print mine when I think it is what I want and refer to it constantly. Give it a try as you might be surprised how much information is available.

Tended App is an option that works on phones, tablets, and desktops: https://www.tendedapp.com It lets you visually design a garden including adding notes on individual plants, track your activities and harvests, and see reports about your growing. There's also basic task management on a calendar view, the ability to upload photos, and it lets you see other gardeners' layouts as well. Check it out!

hahaha mushcreek. I can relate as I used to do paper sculpture. I suppose I could do a scaled model of my house. Hmm, maybe I should? Nah! Lindsy, I did use my computer program (photoshop) to sketch up what I wanted at first. I didn't work with an architect which is probably why it took me so long. I worked with a draftsman. Big Mistake! If I had it to do over, I would have brought my ideas to an architect. This is the very first sketch I brought the draftsman. Notice I didn't really concern myself with actual sizes etc but only with an overall general feel of which rooms I wanted where. For example, I knew the garage had to be where it was and I was required to have the front door on the other street (it's a corner lot). I also knew I wanted a "courtyard feel to my back yard and I wanted my kitchen near my garage. I also knew I wanted the master, DH's study (labeled den) and the great room to open to the yard. The problem was as some here alluded to, was that he then got stuck on the idea of the stairway where I had it, etc. He couldn't visualize anything on his own. I have a design background, so wound up designing it completely by myself WITH the help of the folks and especially with the help of the architects on this forum. And this is what we wound up with:

Graph paper and pencil are your best option.