Zone 7 offers a long growing season with mild winters and hot summers. This climate makes Zone 7 one of the most versatile areas for planting both cool-season and warm-season crops. The main challenge is to support plants during summer heat and humidity. These conditions may vary greatly from the Eastern to the Western parts of the Zone. Since many gardeners wonder about growing here, KVITER experts have prepared the best species for USDA Zone 7, planting calendar, and care tips.
What Is USDA Hardiness Zone 7?
Zone 7 is an area on the Hardiness Map with average minimum winter temperatures between 0°F and 10°F (–18°C to –12°C). Thanks to long growing seasons (185–220 days) and 30–50 inches (76–127 cm) of rainfall annually, this Zone is one of the most flexible for gardening. The first frost date is usually in Late October to mid-November, while the last frosts occur in Late March to mid-April.
It is divided into two subzones; each has its own climate features:
- Zone 7a – generally located further north and at higher elevations. Winter lows here are about 0°F to 5°F (–18°C to –15°C). It has slightly colder winters and 20–30 frost events per year. The first frosts occur in early November, while the last lows are typically in mid-April. The length of growing season is approximately 185–200 days.
- Zone 7b – lies further south and at lower elevations. The coldest temperatures are from 5 degrees to 10 degrees (–15°C to –12°C). This subzone has milder winters and fewer frost events (10–15 yearly). The first frost is in mid-November, while the last one is in Late March–early April. The growing season is about 200–215 days long.
Urban areas in growing Zone 7 may act as 7b, even if they are officially 7a. Take it into account when planning your garden, as it affects the germination of tender seeds, which need exact conditions to sprout.
Where Is Zone 7 Located?
Zone 7 spans 28 states, including the Mid-Atlantic, the Tennessee Valley, northern Arkansas, Oklahoma, parts of Texas, the Pacific Northwest, the interior valleys of California, and parts of the Southwest. Keep in mind that the Zone Map is only a guide for understanding the microclimate of your region, but not a guarantee of successful gardening. Check your USDA Hardiness Zone.
What to Plant in Zone 7
Most people are interested in the best plants to grow in Zone 7. It’s worth noting that this area is suitable for annuals and perennials, and supports both hardy plants and warm-season crops.
Perennials for Zone 7
Many perennials thrive in Zone 7 thanks to its long gardening season and mild winters. Gardeners here enjoy a wide range of perennial species that provide color, structure, and pollination support to their yard. At the same time, hot and dry summer conditions are common challenges. In the eastern part of the Zone, people also face fungal issues. Examples of perennial plants in our list below:
- Coneflower
- Black-Eyed Susan
- Lavender
- Yarrow
- Salvia
- Bee Balm
- Aster
- Phlox
- Milkweed
Annuals for Zone 7
USDA Plant Hardiness Zone 7 is also good for various annual plants. These species sprout, grow, and die in one growing season, so you should replant them each year. The main benefit of this Zone is 185–220 frost-free days, which makes it possible to grow annuals that prefer both cool and warm conditions. Annual Zone 7 flowers attract pollinators and add incredible blooms to your garden. Among annuals for Zone 7 are:
- Cosmos
- Zinnias
- Marigolds
- Sunflowers
- Nasturtiums
- Calendula
- Sweet Alyssum
- Petunia
- Scarlet Sage
- Lettuce
- Spinach
Vegetables for Zone 7
Undoubtedly, vegetables are one of the most desired plants in a Hardiness Zone 7 garden. They produce flavorful crops that are rich in nutrients and vitamins and are usually used for cooking. The climate allows you to grow warm-season vegetables after the last frosts and cool-season crops in early spring or fall. Zone 7 vegetables category includes:
Warm-season:
- Eggplant
- Peppers
- Tomatoes
- Squash
- Cucumbers
- Watermelon
- Green Beans
- Mustard Greens
- Sweet Potatoes
- Corn
- Pumpkin
Cool-season:
- Broccoli
- Cabbage
- Carrots
- Peas
- Beets
- Swiss Chard
- Onions
- Radishes
- Cauliflower
Herbs for Zone 7
A herb garden is absolutely worth growing, as it produces flavorful leafy yields, deters pests, and attracts beneficial insects to nearby crops. Zone 7 herbs like cilantro or dill may start bolting in summer heat, while Mediterranean species require irrigation in western dry areas. Check certain herbs, such as basil and mint, for fungi from time to time. Among herbs for Zone 7 are:
- Basil
- Mint
- Rosemary
- Thyme
- Oregano
- Dill
- Cilantro
- Parsley
- Sage
- Chives
- Marjoram
When to Plant in Zone 7 (Planting Calendar)
When discussing our Zone 7 growing zones guide, it’s impossible not to say that planning matters a lot. You need to know what to do in your garden in every season. That’s why we’ve created a planting calendar for you; learn it before planting to reach better results and avoid failures.
Spring in Zone 7
Start your cool-season crops, such as spinach and beets, outdoors in March. Early spring is also the time to start warm-lovers indoors, if you want to extend their growing season. Remember that you will need to harden off seedlings 7–10 days before transplanting them outdoors in April. This month in Zone 7 is also ideal for sowing beans, corn, and squash.
Summer in Zone 7
In May–June, you can sow cucumbers, melons, and pumpkins directly on the ground. Also plant basil, oregano, rosemary, and thyme herb seeds. To attract more pollinators and deter soil nematodes, start marigolds and zinnias. Not as hot as in Puerto Rico, but Zone 7 is known for its summer heat, so mulch heavily to retain soil moisture and reduce heat stress for plants.
Fall in Zone 7
Fall in USDA Hardiness Zone 7 is good for cool-season crop planting. Plant Hardiness Zone Map temperatures also show that you can start dill, cilantro, and parsley under proper weather conditions. In October-November, plant onions for spring harvest. Additionally, use row covers over tender crops in late autumn to extend yields.
Winter Prep in Zone 7
Mulch soil around perennials with straw or leaves to protect their root system from cold temperatures. Sow clover, rye, or winter wheat to make your soil more fertile for the next season. Also cut back perennials and prune shrubs. Clean and sterilize your garden tools to prevent microbial growth while storing. Plan your gardening for the next year and order seeds.
How to Grow Successfully in Zone 7
As we told you earlier, the USDA Plant Hardiness Zone Map is a guide, but not a guarantee of successful planting. The important aspect is seed quality, as high-quality seeds produce hardy, true-to-type crops with great resistance to diseases. If you are looking for a store to buy premium heirloom seeds, KVITER is your reliable partner. We meticulously select each seed packet to ensure gardeners get a high germination rate from sowing. We also offer free shipping for orders over $49.
Moreover, factors such as humidity, soil, light, and others may affect your gardening, making it slightly warmer or cooler. Let’s learn more about it to provide the right growing conditions for your Zone 7 cold-hardiness plants.
Sun
Most plants for Zone 7 require 6–8 hours of sunlight daily, while lettuce and spinach like partial shade with 3–5 hours of light per day. USDA Plant Hardiness Zones 6 and 7 are prone to summer heat waves, so you will need to protect your plants from time to time. Use shade cloth during hot peaks to prevent leaves from scorching and herbs from bolting.
Water
Water your plants 1–1.5 inches (2.5–4 cm) of water per week, splitting this amount into 2–3 applications. Deep irrigation helps to strengthen the root system and make species more hardy and drought-tolerant. Irrigate in the morning to prevent evaporation and avoid moisture on leaves.
Soil & Drainage
Soil types may vary across the USDA Hardiness Zone 7 map. For instance, in the mid-Atlantic, the soil is clay loam, while areas in river valleys are known for sandy loam. In any case, drainage is essential, so add perlite to improve it if needed. Furthermore, compost is great for improving the soil structure and fertility. Another option for better drainage is raised bed gardening, as you can control soil conditions. Rotate crops yearly to prevent soil depletion.
Mulch & Winter Protection
Apply 3–4 inches (7–10 cm) of mulch around your perennial plants before frosts to protect them from the coldest temperatures in Zone 7. By the way, mulch is also useful to prevent tender crops from heat stress in hot summer. Sow cover crops, as they act as a living mulch, maintaining soil temperature and fertility.
Cold Stress & Wind Siting
Although Zone 7 has mild winters, cold stress may happen in certain cases, especially during unexpected weather conditions. Plant tender crops in south-facing beds for better warmth. Also, you can use fences, windbreakers, or trellises to protect your plants from wind. It’s worth saying that wind is one of the most common reasons for cold stress.
Frequently Asked Questions About Growing Zone 7
What does USDA Hardiness Zone 7 mean?
Zone 7 is an area designated by the United States Department of Agriculture with the lowest winter temperatures of about 0°F to 10°F (–18°C to –12°C). The growing season in this zone is 185–220 days long, while the climate is known for mild winters and hot summers.
What is the difference between Zone 7a and 7b?
The main difference between Zone 7a and 7b is their climate. Zone 7a has colder winters and more frost events yearly. It also has 185–200 frost-free days. Zone 7b has milder winters with fewer frost events per year and a longer growing season compared to Zone 7a.
What grows well in Zone 7?
This Zone is suitable for growing annuals, perennials, vegetables, and herbs. Another benefit is that it’s possible to plant both warm-season and cool-season crops. Among the most common species for Zone 7 are: carrots, squash, cucumbers, tomatoes, thyme, basil, oregano, marigolds, nasturtiums, zinnias, and others.
How cold-hardy do plants need to be for Zone 7?
In Zone 7, plants need to be hardy enough to withstand average minimum temperatures between 0°F and 10°F (–18°C to –12°C). That means when you’re choosing perennials, vegetables, or herbs, you should look for plants rated cold-hardy to Zone 7 or lower: Zones 6, Zone 5, or Zone 4.
When should I start planting in Zone 7?
The moment to start planting depends on species' growing requirements. For instance, start carrots outdoors, or tender plants like tomatoes indoors in early spring. Cucumbers are best sown in summer, as a warm-season vegetable. Start cool-season crops, such as broccoli and cabbage, in fall.
