When to Plant Heirloom Tomatoes in Arizona

Arizona's hot and dry climate can make it challenging to grow some crops, including tomatoes. However, with the right timing and preparation, you can still enjoy a bountiful harvest of heirloom tomatoes in your backyard. Here's everything you need to know about when to plant them in Arizona.

Choosing the Right Varieties

The first step to growing successful heirloom tomatoes in Arizona is to choose the right varieties. Some heirloom tomato cultivars are better suited to hot and dry climates, while others may require more moisture and cooler temperatures. Some of the best heirloom tomato varieties for Arizona include:

Black Cherry

Cherokee Purple

Roma

Sungold

Yellow Pear

Make sure to choose varieties that are disease-resistant, as Arizona's high temperatures and dry air can make tomato plants more susceptible to pests and diseases.

Planting Timing

The best time to plant heirloom tomatoes in Arizona is in late winter or early spring, around February to March. This timing allows the plants to mature and set fruit before the scorching summer weather sets in. Planting earlier in the season can also give the plants a head start before insects and diseases become more active.

For fall planting, you can plant your tomatoes in September or early October, which will allow them to mature before the first frost. However, keep in mind that the shorter days and cooler temperatures of fall may slow down the plant growth and require more time for the fruits to ripen.

Preparation and Care

Before planting your heirloom tomato seeds or seedlings, make sure to prepare the soil by adding organic matter, such as compost or aged manure, to improve its water retention and nutrient content. Additionally, you'll want to choose a location that gets plenty of sun and good drainage.

Once your tomatoes are planted, make sure to take good care of them by watering them deeply but less frequently, avoiding overhead irrigation that can increase the risk of diseases. Additionally, you may want to use a mulch layer or shade cloth to protect the plants from intense sun and reduce water evaporation from the soil.

Harvesting

As your heirloom tomatoes start to mature, make sure to check them regularly in order to harvest them at their peak. Heirloom tomatoes can vary widely in their color and shape, and may not turn as uniformly red as their hybrid counterparts. However, the best way to know when to harvest them is to use your senses. Ripe heirloom tomatoes will smell fragrant and feel slightly soft to the touch. Overripe tomatoes may become mushy and develop cracks, while underripe ones can have a sour taste and a harder texture.

By following these tips and timing your planting right, you can grow delicious and healthy heirloom tomatoes in your backyard all year round in Arizona.