When To Start Planting Flowers In A Greenhouse In The Wisconsin Region

Wisconsin is a U.S. state endowed with beauty, and when to start planting flowers in a greenhouse in the Wisconsin region has been a point of interest for many gardeners. 

Situated in the midwestern state in the U.S., Wisconsin has coastlines on two Great Lakes, namely Superior and Michigan lakes, as well as an interior of farms and forests. Its largest city, Milwaukee, is where you can find the Milwaukee Public Museum, with the various international villages re-created, and the Harley-Davidson Museum that showcases a variety of motorcycles. 

But unbeknownst to many may be the great potential of the state to become a promising location for farms and gardens alike, as well as greenhouses. Without further ado, here is the rundown of insights.


When Can You Start Planting In Wisconsin?

Your so-called cole crops, which include broccoli, cauliflower, and cabbage may be directly seeded into your greenhouse on March 21st, assuming that you can work on the ground for this cultivation. However, it will be best to begin these indoors around February 22nd, then start transplanting them right into your garden by April 12th. 

When you have lettuce or spinach, do the same with these crops. It is every March 3rd when the farmer may begin planting onion, as well as potatoes. The seeds of the peas, for instance, the sugar snap and English seeds may also be planted right at the same time. When the ground is frozen, then you can plant these as soon as it thaws. 

Should you want to grow eggplants, tomatoes, and peppers, you can begin these indoors around the 22nd of February, and right on the 28th of April, you may begin monitoring the weather patterns, and as soon as no frost is on the forecast. Go on and start transplanting these on your ground.

When Can I Start Planting Flowers In Wisconsin?

When to start planting flowers in a greenhouse in the Wisconsin region? It is best to know when you can start planting them too. In the state, the hardiest of these flowers could be cultivated and planted once the soil in the garden and greenhouse is ideal, and this is possible even if there have been several weeks prior to the season’s last frost.

For flowers of the half-hardy category, you may need to hold off until a couple of weeks prior to the final frost, and for flowers categorized as tender, start planting when there are no chances of frost for the rest of the season you are in.

Here are some of the best flowers to grow in the area.


The genus known as Echinacea has ten species, known as coneflowers. This genus or group of flowering plants in the herbaceous category is also from the daisy family. Native in east and central North America, they are cultivated in open wooded areas and dry prairies, or the palouse


On the other hand, asters refer to the genus of perennial flowers from the family known as Asteraceae. It consists of about 180 species, and native in the Eurasian region and various species of the former Aster are now from other genera of the Astereae tribe.

Mammoth Mum

These mammoth mums are likewise called daisies, beautiful mums in the garden that universities continuously and vigorously develop for their hardiness. Once they are established, they may grow up to three feet tall, spanning across four feet. Compared with the common pot mums, they tend to be on the hardier side and may look different based on the zone, as they flower well in the south.

Russian Sage

Characterized by the silvery grey hues, the Russian sage offers the garden with such a statement piece. The spiky cluster of such flowers blooms from late in the spring up until the fall season, appearing in such a way they obscure the leaves. There are more flowers in the Wisconsin state you can consider planting.

What Zone Is Wisconsin In For Planting Flowers?

There are three cold hardiness zones in Wisconsin, namely the Northwestern WI at Zone 3, North, Central and Western WI at Zone 4, Southern and Eastern WI at Zone 5, and this fifth zone goes up past Apostle Islands and Green Bay.

To give you a background, cold hardiness zones refer to the ability of the plants to survive the winter season. It plays an essential role in landscaping the state’s plants, and with the USDA classifying the country into 13 plant hardiness zones based on the annual, average temperature in the 30-year period, you can get to have the right plants during your gardening year.

What Can I Plant Now In Wisconsin?

Right now is the time when you can plant the seeds in Wisconsin, and the list may include beets, carrots, chard, kohlrabi, late cabbage, leaf lettuce, collards, turnips, radish, onion sets, and more. 


  • Boosts your metabolism
  • Treats indigestion
  • Prevents cancer
  • Soothes sore throats and pneumonia
  • Reduces the severity of respiratory conditions

Late Cabbage

  • Has anti-inflammatory properties
  • Great for vision health
  • Gives you stronger teeth and bones
  • Improves memory and concentration
  • Gives you beautiful skin, as it enhances the hair health



  • Rich in vitamins, magnesium, and more
  • Good for your eye’s health
  • Reduces blood pressure levels
  • Regulates oxidative levels in your physique


  • The perfect source of energy
  • Great source of Vitamin B6
  • Improves bone health
  • Enhances your heart health
  • Improves digestion
  • Great for weight management

Is It Too Early To Plant Flowers In Wisconsin?

No matter how warm the temperature and the weather may get today, planting them in March will be earlier for flowers such as marigolds, coleus, begonias, impatiens, etc. Many of these perennials may be planted immediately, however, 

When to start planting flowers in a greenhouse in the Wisconsin region will get you the better produce if you follow guidelines and planting hacks according to how they are cultivated in the open field. Keeping yourself armed with such insights will take you into having the best and beautiful flowers for your greenhouse and gardens.

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