Don't rely on internet articles, go to gardeners and garden shops in your area to find proper planting times for your climate zone. There are many valid tips from other zones, but you have to apply them at the proper season for where you live. Look at seed packets: they will say how long to germination (sprout) and how long until harvest. Do the math. If tomatoes don't set fruit after the temperature reaches 100, or cucumbers are sensitive to frost, your local weather service will have the historical averages and you can plan the best planting time.