Bad soil conditions can be caused by insufficient irrigation, compacted soil, or too much water. Add compost to the top four inches of soil and mulch to help retain moisture.
Most seasonal crops, like tomatoes, need sun, preferably more than 6 hours per day. If you don’t have enough sun, choose cool season species.
With the right growing conditions, your vegetable garden can get out of control. If you prefer some order, make sure to leave enough room for each crop in your planning.
Regular garden soil is filled with seed that can grow and crowd the paths and the beds. Try to suppress the weeds with mulch. Avoid pulling if possible, cut annual weeds before they go to seed.
There are many plant pests with many different causes. Attracting predatory insects is your best defense. Look up your pest and find specific advice online. If you can, start with the least-harmful solution.
There are many types of diseases. Make sure your garden has enough ventilation. Remove sickly plant parts (putting them in the trash not the compost) and clean your tools after handling them. Look up diseases and cures online.