Best Tips For Growing Spinach in Wisconsin

Growing Spinach in Wisconsin

Growing spinach in Wisconsin is a great choice for all gardeners from beginners to experienced. The goal for this guide to help you be successful in growing spinach in Wisconsin with these tips for success!

In this article, we’ll guide you through the process of growing spinach, from planting to harvest. Learn about the ideal time to plant spinach seeds, how to protect your plants from frost, and common mistakes to avoid.

With our expert advice and precise guidelines, you’ll be well-equipped to cultivate a bountiful crop of delicious spinach in your Wisconsin garden. Looking for tips from planting to harvest, check out this comprehensive guide.

Key Takeaways

– Pay close attention to local weather in spring and watch for the last frost occurrence.

– Start spinach seeds indoors approximately 35-40 days before the last average frost date.

– Harden spinach plants gradually by increasing their outdoor exposure time.

– Plant spinach in rows, 2 inches apart, in cool and moist soil after the last frost.

Growing Spinach in Wisconsin

There are several reasons why you should consider growing spinach in Wisconsin.

First and foremost, spinach is a cool weather crop that thrives in the cooler temperatures of Wisconsin’s climate. It prefers temperatures between 50-70°F (10-21°C), which makes it an ideal vegetable to grow in this region.

Another reason to grow spinach in Wisconsin is its versatility as a vegetable. You can use fresh spinach leaves in salads, sautés, soups, or stews, adding a nutritious boost to your meals. Spinach is packed with vitamins and minerals, making it a healthy choice for your diet.

Furthermore, growing spinach allows you to have access to fresh produce right from your own backyard. By planting and cultivating your own spinach plants, you can ensure that they are grown without the use of harmful pesticides or chemicals.

Additionally, growing your own spinach can be cost-effective. Instead of constantly buying packaged spinach from the store, you can save money by harvesting your own supply whenever you need it.

Lastly, growing spinach in Wisconsin gives you the opportunity to support local agriculture and promote sustainability. By growing your own food, you reduce reliance on long-distance transportation and support local farmers’ markets.

Growing Zones in Wisconsin

Wisconsin has different growing zones that determine the best times to plant and grow various vegetables. These zones are based on factors such as temperature, frost dates, and climate conditions. It is important to know your specific growing zone in Wisconsin to ensure successful spinach cultivation.

In general, Wisconsin falls under USDA hardiness zones 3-6. Zone 3 experiences colder temperatures compared to Zone 6. The average last frost date in Zone 3 is around late May, while in Zone 6, it can be as early as mid-April.

To determine the best time to plant spinach in your area, pay attention to local weather patterns and watch for the last occurrence of frost. Wait until there hasn’t been a frost for at least two weeks before planting spinach outside. This will help prevent damage to the young plants.

If a frost is predicted after planting spinach, take action to protect your plants. Bring potted spinach plants indoors or cover those planted in the ground with burlap to increase their chances of survival.

For optimal timing when starting spinach seeds indoors, calculate approximately 35-40 days from seed germination until transplanting. Determine the last average frost date in your area and subtract 40 days from it. This will give you an estimate of when to start your seeds indoors.

Hardening spinach plants gradually before transplanting them outdoors is beneficial for their resilience against diseases, insects, droughts, and wet conditions. Increase their outdoor exposure time by one hour each day until they are outside for about eight hours before transplanting.

Spinach Varieties: Growing Spinach in Wisconsin

Here are some great cool weather varieties that are great for growing spinach in Wisconsin:

  1. Savoy Spinach:
    • Savoy spinach is known for its crinkled or curly leaves, which give it a unique texture and appearance. It’s a cold-hardy variety and can withstand frost. Popular cultivars include Bloomsdale and Regiment.
  2. Flat Leaf Spinach:
    • Flat leaf spinach has smooth, flat leaves that are easier to clean than savoy varieties. It’s often used in salads and is known for its tender texture. Tyee and Space are common flat leaf spinach varieties.
  3. New Zealand Spinach:
    • New Zealand spinach is a different species from true spinach but is grown similarly. It thrives in cooler weather and is known for its trailing growth habit. It’s more heat-tolerant than true spinach.
  4. Winter Bloomsdale Spinach:
    • As the name suggests, this spinach variety is well-suited for winter growing. It has a rich, dark green color and a mild, sweet flavor. Winter Bloomsdale is a savoy-type spinach.
  5. Giant Winter Spinach:
    • This variety produces large, thick leaves that are excellent for cooking. It’s hardy in cold weather and can withstand frost.

When to Plant Spinach Seeds in Wisconsin

Pay close attention to the recommended planting times based on your specific growing zone to ensure your spinach seeds’ successful growth in Wisconsin.

The best time to plant spinach seeds in Wisconsin is in early spring, as soon as the soil can be worked and the average soil temperature reaches 40-75°F (4-24°C). For most areas in Wisconsin, this falls around late March to early April. However, it’s important to note that spinach seeds can tolerate light frosts, so you can start planting even before the last frost date.

If you prefer a fall crop of spinach, you can sow seeds in late summer, around mid-August to early September. This allows enough time for the plants to establish before colder temperatures set in. Spinach prefers cooler temperatures between 50-70°F (10-21°C), so avoid planting during the heat of summer when the temperatures consistently reach 75°F (24°C) or higher.

When planting spinach seeds, choose a suitable variety for your region and sow them directly into prepared soil. The site should receive at least 6 hours of direct sunlight per day and have well-drained soil with adequate organic matter. Keep the soil consistently moist by watering regularly, but avoid overwatering, which may lead to root rot.

How to Protect Spinach from Frost

If you want to protect your spinach from frost, there are a few steps you can take. First, cover the plants with burlap before sunset when a frost is predicted. Be sure to secure the edges of the burlap to prevent it from blowing away. This acts as a protective barrier against freezing temperatures.

Second, if you have potted spinach plants, bring them indoors when a frost is expected. Find a suitable location where they can receive sufficient light and temperature control.

Third, stay informed about weather forecasts in your area. Keep an eye out for potential frosts and take action accordingly to safeguard your spinach crop.

By following these steps, you can minimize the risk of frost damage to your spinach plants. Remember that prevention is key when it comes to protecting your crops from extreme weather conditions such as frost.

However, keep in mind that while these methods are effective in preventing immediate damage, prolonged exposure to cold temperatures can still impact plant health and productivity. It’s important to plan your planting schedule carefully and consider using cold-hardy varieties suited for your climate.

Now that you know how to protect your spinach from frost, you can ensure a successful harvest and enjoy fresh, leafy greens throughout the growing season.

When to Start Spinach Seeds Indoors

When starting spinach seeds indoors, it’s important to determine the last average frost date and subtract 40 days for optimal timing. This will ensure that your spinach plants are ready to be transplanted into the garden at the right time.

To start spinach seeds indoors, you will need containers or seed trays with drainage holes, a good quality seed starting mix, and a warm location with plenty of light.

Fill the containers with the seed starting mix, moisten it slightly, and then plant the spinach seeds about half an inch deep. Place the containers in a warm location where they can receive at least 6-8 hours of direct sunlight each day. Keep the soil consistently moist but not waterlogged.

Once the spinach seeds have germinated and sprouted, you can thin them out to ensure proper spacing between plants. Thin them to about 2-3 inches apart to allow room for growth.

As the seedlings continue to grow, make sure to provide adequate ventilation by opening windows or using fans to prevent damping-off disease. Also, gradually acclimate the seedlings to outdoor conditions by exposing them to increasing amounts of sunlight and temperature fluctuations over a period of one to two weeks before transplanting them into your garden.

By starting your spinach seeds indoors and following these steps carefully, you’ll give your plants a head start on growing spinach in Wisconsin and increase their chances of thriving in your garden.

Common Mistakes When Growing Spinach in Wisconsin

One common mistake when growing spinach in Wisconsin is insufficient watering, which can result in small leaves and a low crop yield. To ensure the optimal growth of your spinach plants, it is important to provide them with adequate water. Here are some tips to help you avoid this mistake:

– Water deeply: Spinach needs consistent moisture to thrive. Water the plants deeply, aiming for 1 inch of water per week. This will help prevent the roots from drying out and promote healthy leaf development.

– Avoid overwatering: While it is important to keep the soil moist, be careful not to overwater your spinach plants. Overwatering can lead to root rot and other diseases. Make sure that the soil has good drainage to prevent waterlogging.

– Monitor soil moisture: Regularly check the moisture level of the soil using your finger or a moisture meter. If the top inch of soil feels dry, it’s time to water again. Be mindful of weather conditions and adjust your watering schedule accordingly.

By following these watering practices, you can ensure that your spinach plants receive enough moisture for optimal growth and yield. Remember that maintaining proper hydration is crucial for producing healthy and abundant spinach crops in Wisconsin’s climate.

Source: University of Wisconsin-Madison Division of Extension


Growing spinach in Wisconsin can be a rewarding and successful endeavor if you follow the best tips.

Take note of the average frost dates and protect your spinach from frost to ensure healthy growth.

Start your spinach seeds indoors at the right time for a head start.

Avoid common mistakes such as overcrowding and overwatering.

Harvest your spinach when it reaches the desired size and enjoy its nutritious benefits.

With these tips and trickes, you will have a thriving spinach garden in Wisconsin with proper care and attention.

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