Let’s Grow Some Onions!
Tips and Info for Growing Onions in Zone 5
Onions are one of those crops that feel simple… until you try to grow them.
Then you realize — timing matters, spacing matters, and choosing the right type matters.
But once you understand a few key things, onions become one of the most reliable and rewarding crops you can grow.
And in Zone 5, April is your moment to get them started.
🧅
Why Onions Are Worth Growing
Onions don’t just fill space in the garden — they anchor your entire growing season.
They store well.
They’re used in almost everything you cook.
And they’re one of the first crops you can confidently plant outdoors.
If you’re building a garden that feeds your household, onions are a must.
🌿
Sets, Seeds, or Transplants — What Should You Use?
This is where most people get stuck.
- Onion sets: Small bulbs that are the easiest and most forgiving option. Great for beginners and quick results.
- Transplants: Young plants that give you a head start and tend to produce larger onions with better consistency.
- Seeds: The most variety, but require the most patience and early indoor timing.
For most gardeners in our area, sets or transplants are the way to go in April.
🎥
Want to See It in Real Life?
If you’re more of a visual learner, I walk through planting onions step-by-step here — including spacing, feeding, and the difference between sets and transplants.
🌱
When to Plant Onions in Zone 5
As soon as your soil is workable, you’re ready.
Onions are cold-tolerant and actually prefer getting established in cooler temperatures. Waiting too long can reduce bulb size later in the season.
If you can dig the soil, you can plant onions.
🌿
How to Plant for Success
Onions don’t need complicated care — but they do need consistency.
- Plant them in full sun with well-draining soil.
- Space them about 4 inches apart if you want full-size bulbs, or closer if you’re okay harvesting smaller onions.
- Keep the rows clean and weed-free — onions don’t like competition.
- And don’t bury them too deep. Just enough to anchor them.
💧
Watering and Feeding
Onions have shallow roots, which means they need steady moisture.
Not soaked. Not dry. Just consistent.
If they go through long dry stretches, bulb development can suffer.
A balanced fertilizer or compost-rich soil will help keep them growing strong early on.
🌞
A Quick Tip Most People Miss
Day length matters.
In our area, you want long-day onions, which begin forming bulbs as daylight increases.
Planting the right type is just as important as planting at the right time.
🌿
Keep It Simple
You don’t need a huge garden to grow onions well.
A single row can go a long way.
A small bed can supply your kitchen for months.
And once you grow your own, it’s hard to go back.
There’s something about pulling an onion from the ground that just feels… foundational.
If you need onion sets, transplants, soil, or just want help choosing the right variety, we’re here to help you think it through.
Let’s build this season the right way 🌱
The Landscape Connection
4472 S. Mulford Rd.
Rockford, IL 61109
Learn simple, sustainable lawn care practices for Zone 5, including mowing, watering, and soil tips to build a healthier lawn naturally.
Learn how to grow asparagus in Zone 5, including when to plant crowns, how to prepare soil, and what to expect in the first few years.
What to plant in April in Zone 5, including cool-season crops, early flowers, and essential spring garden tasks to set your growing season up for success.
Learn how to pre-sprout ranunculus in Zone 5 for strong spring blooms. Step-by-step soaking, planting, timing, and storage tips for Northern Illinois gardeners.
Pruning in March made simple for Zone 5 gardeners. Learn which shrubs to cut, which to leave, and how to prune without losing blooms.
What to start indoors in March in Zone 5. A simple seed guide for vegetables, flowers, and herbs, plus timing tips to grow strong, healthy seedlings for spring planting.
Six practical garden design foundations for Northern Illinois Zone 5 — soil, spacing, plant placement, and choosing plants that work together.
Support winter birds with easy homemade suet recipes, including bark butter, no-melt suet, and suet wreaths, plus storage and feeding tips.
Learn how to tell if dried herbs are still good, the best ways to use them up, and simple infusion methods for vinegars, oils, and compound butters.
A DIY seed-starting how-to for Zone 5 gardeners, including what seeds to start in February, beginner-friendly setup tips, and proven methods for healthy seedlings.
