[Cletus.D.Yokel]

I’m in mid-Michigan.
Last frost is May 15 (5A).
Which seed plants should I have in my ‘starters’ by the end of the month?

[Diana in Wisconsin]

End of January is too early for most seed starting in Zone 5a. I’m in Zone 5a, too. Starting them too early is going to give you leggy, spindly plants and you don’t want that! The earliest seeds I ever start are Pansies and Violas - they are slow to germinate.

Seeds to Start Early to Mid-February (8-10 Weeks Before the Last Frost)

It can be really difficult to start seeds in February when we’re in the middle of the freezing winter. I love to look at photos of my beautiful veggies and flowers to get more into the gardening mood.

Tomatoes
Peppers
Eggplants
Chilies
Marigolds
Zinnias
Calendula
Chamomile

Zinnias & chamomile flowers can be slow starters so giving them a head start inside will ensure you have a bright season full of blooms.

Seeds to Start late-February to Early March (6-8 Weeks Before Last Frost Date)

Cucumbers
Melons
Kale
Cabbage
Broccoli
Lettuce
Basil
Thyme
Sunflowers-these can be started outdoors after the danger of frost but starting them indoors will give you earlier blooms.

Seeds to Start Mid March to Early April (4-6 Weeks Before Last Frost Date)

Calendula
Marigolds
Herbs (Cilantro, Parsley, Oregano)
Spinach
Arugula
Nasturtiums
Watermelon
Luffa
Pumpkins

Frost-Tolerant Seeds to Start Outdoors Early to Mid April

These seeds can be started outdoors before your last frost date because they can survive some light frost. They are cold-tolerant plants.

Sugar Snap Peas
Snow Peas
Spinach
Lettuce
Cabbage
Mustard Greens
Arulula
Kale
Swiss Chard
Radishes
Beets
Carrots
Turnips
Broccoli

https://homelyhens.com/garden/start-seeds-indoors-in-zone-5/

[Diana in Wisconsin]

Go to this link and type in your Zip Code for a personalized planting calendar. :)

https://www.almanac.com/gardening/planting-calendar