In July there is still enough warm weather in the growing season to plant short-maturing, hot-weather crops such as green beans, corn and cucumbers. If starting a winter garden is your plan, this is the month to sow cool-season crops such as lettuce, peas, carrots and spinach. Vegetables to transplant this month include Brussels sprouts, cabbage, broccoli and cauliflower. Timing is essential for vegetables to grow in July.