What to Plant in Spring: A Seasonal Month-by-Month Seed Starting Guide

Every year, right around late winter, I get that itch.

The sun hangs around a little longer. The soil doesn’t feel rock hard anymore. And suddenly I’m standing in my kitchen, coffee in hand, wondering what to plant in spring this time.

If you’ve ever bought seeds too early, planted too soon, or completely forgot about succession planting (been there), this guide is for you.

Spring isn’t one big planting moment. It unfolds month by month. And knowing what to plant in spring — at the right time — makes everything easier. Less stress. Better growth. More joy.

Whether you’re working with a backyard garden, raised beds, or a sunny balcony with containers, this seasonal seed starting guide will walk you through it like a neighbor leaning over the fence giving you real advice.

Let’s break it down.

Late Winter to Early Spring (February–March): Start Cool-Season Crops

This is when the gardening brain kicks in hard.

If you’re in cooler zones, you’re mostly starting seeds indoors. Warmer states? You might already be sowing outside. Either way, this is prime time for cool-weather crops.

When people ask me what to plant in spring early on, I always say: think leafy and hardy.

• Lettuce
• Spinach
• Kale
• Broccoli
• Cabbage
• Cauliflower
• Peas
• Radishes

These guys actually prefer cooler soil. They don’t complain about a light frost. In fact, some taste even better after chilly nights.

You can direct sow radishes and peas outside as soon as your soil is workable. For broccoli and cabbage, I usually start them indoors under grow lights about 6–8 weeks before my last frost.

This is also when I start herbs like parsley and cilantro. They’re slow starters, but totally worth it.

If you need fresh stock, quality tested, viable seeds for these early crops, you can browse Seed Organica’s collection. I like ordering early so I’m not scrambling when planting time hits.

Mid-Spring (April): The Transition Window

April is tricky. It’s hopeful… but unpredictable.

Some days feel like summer. Others? Not so much.

This is the month where what to plant in spring depends heavily on your last frost date. If frost risk is mostly behind you, you can start expanding your planting list.

Here’s what I typically plant or transplant now:

• Carrots
• Beets
• Swiss chard
• More lettuce (succession planting!)
• Onions
• Potatoes

Indoors, I’m starting warm-season crops:

• Tomatoes
• Peppers
• Eggplant
• Basil

These need warmth and patience. Don’t rush them outside. Cold soil will just stunt them and make you frustrated.

If you’re gardening in containers, April is perfect for setting up your soil mix, refreshing pots, and mapping out your layout. I sketch mine on scrap paper every year. Half the time I change it. Still helps.

This is the season where planning makes your summer garden easier.

Late Spring (May): Warm-Season Planting Time

Now we’re talking.

Once your frost date has safely passed and nighttime temps stay above 50°F, you can finally plant the heat lovers.

When folks search what to plant in spring, this is usually what they’re picturing:

• Tomatoes
• Peppers
• Cucumbers
• Zucchini
• Squash
• Beans
• Corn
• Melons

This is go-time for direct sowing beans and cucumbers. They hate being transplanted.

Tomatoes and peppers you started indoors? Harden them off slowly. A little sun each day. Don’t shock them.

I also like planting marigolds and nasturtiums around this time. Not just because they’re pretty — they bring life and color to the garden and pair beautifully with vegetables.

Make sure you’re using quality tested seeds from a trusted source. If you’re building out your warm-weather lineup, you can explore more varieties at SeedOrganica.com. They carry solid options for home gardeners, not bulk farm stuff.

Herbs and Flowers to Plant in Spring

Vegetables get all the attention. But herbs and flowers? They’re the personality of your garden.

When deciding what to plant in spring, don’t skip these:

• Basil (after frost)
• Dill
• Cilantro
• Parsley
• Sunflowers
• Zinnias
• Cosmos
• Calendula

Many flowers can be direct sown once soil warms up. Sunflowers especially — they’re ridiculously satisfying to grow from seed.

Herbs work beautifully in containers. If you’re tight on space, a few pots on a patio can give you fresh flavor all season.

And here’s something I learned the hard way: plant herbs near your kitchen door if you can. If they’re easy to grab, you’ll actually use them.

How to Decide What to Plant in Spring (Without Overthinking It)

I used to overplan. Charts. Spreadsheets. Way too many seed packets.

Now I keep it simple.

• Check your last frost date.
• Look at how much space you actually have.
• Grow what you’ll actually eat.
• Stagger plantings every 2–3 weeks for continuous harvests.

If you love salads, plant more greens. If your family demolishes salsa in summer, focus on tomatoes, peppers, and cilantro.

Spring gardening should feel exciting — not overwhelming.

If you’re still building your seed stash, take a look at Seed Organica’s spring seed selection. They focus on fresh stock, viable seeds suited for home growers like you.

Pro Tips for Spring Seed Starting

• Warm up your soil with black plastic if your area stays cool.
• Don’t plant everything at once. Space it out.
• Label everything. Trust me.
• Thin seedlings early so plants grow stronger.
• Water consistently, not excessively.
• Mulch once soil warms to retain moisture.
• Keep a small garden journal. It helps next year.

Frequently Asked Questions

When should I start seeds indoors?

Most warm-season vegetables like tomatoes and peppers should be started 6–8 weeks before your last expected frost date.

Can I plant seeds directly outside in spring?

Yes. Crops like radishes, peas, carrots, beans, and sunflowers do great when direct sown at the right time.

How do I know my last frost date?

You can check your local extension office or use tools from trusted sources like the Old Farmer’s Almanac to find your average frost date.

Is it too late to plant in May?

Not at all. May is perfect for warm-season crops in many parts of the U.S.

What if I only have containers?

You can grow tomatoes, peppers, herbs, lettuce, and even zucchini in containers with proper drainage and sunlight.

Conclusion: Start Simple, Grow Confident

If you’re wondering what to plant in spring, start small. Pick a few cool-season crops. Add warm-season favorites once frost passes. Toss in some herbs and flowers for fun.

Gardening isn’t about perfection. It’s about learning, adjusting, and enjoying the process.

When you’re ready to stock up on fresh, quality tested, viable seeds for your spring garden, explore the collection at Seed Organica. Your future summer self will thank you.