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Broccoli takes about 70 to 100 days to grow, depending on the variety you plant and the conditions it grows in.
Some fast-maturing types can be ready in as little as 50 days, while larger, slower-growing varieties can take well over 100 days from transplant to harvest.
If you’ve been wondering how long does a broccoli take to grow in your own garden, the honest answer is that it depends on several factors working together.
In this post, we’ll break down exactly how long broccoli takes to grow, what speeds up or slows down the process, and how to time your planting so you get a solid head at harvest.
Let’s dig in.
How Long Does a Broccoli Take to Grow?
When people ask how long does a broccoli take to grow, the answer usually lands somewhere between 70 and 100 days.
That timeline starts from the day you set transplants in the ground rather than from seed, which adds a few extra weeks if you’re starting indoors.
Here’s the breakdown of how long broccoli takes to grow at each stage.
1. Seed Germination: 7 to 14 Days
Broccoli seeds germinate in about 7 to 14 days when soil temperatures sit between 65°F and 75°F.
If you’re starting seeds indoors, expect the first sprouts within a week or so under warm, consistent conditions.
Cooler soil slows germination, which is why many gardeners start broccoli indoors before the last frost.
2. Seedling Stage: 3 to 5 Weeks
After germination, broccoli spends roughly 3 to 5 weeks growing into a sturdy transplant.
This is the stage where strong light and steady moisture matter most.
By the time seedlings reach 4 to 6 inches tall with a few true leaves, they’re ready to go into the garden.
3. Vegetative Growth: 4 to 6 Weeks
Once transplanted, broccoli focuses on building big, healthy leaves for about 4 to 6 weeks.
This leafy growth is what fuels the eventual head, so how long a broccoli takes to grow really depends on how well this stage goes.
Plenty of sun, rich soil, and consistent watering keep things moving on schedule.
4. Head Formation: 2 to 3 Weeks
The final stretch is head formation, which takes roughly 2 to 3 weeks.
This is when you’ll finally see that tight cluster of green buds appear at the center of the plant.
Check daily once the head starts forming, because broccoli can go from perfect to flowering fast in warm weather.
What Affects How Long Broccoli Takes to Grow
No two gardens grow broccoli at exactly the same pace.
Several factors decide how long broccoli takes to grow in your specific patch.
1. Variety Matters
Different broccoli varieties mature at very different speeds.
Early types like ‘Calabrese’ can head up in around 60 days, while large varieties like ‘Waltham 29’ take closer to 85 to 100 days.
Check the days-to-maturity listed on your seed packet for the most accurate estimate.
2. Temperature Plays a Big Role
Broccoli loves cool weather and grows best when temperatures stay between 65°F and 75°F.
Heat stress can slow head development or cause loose, button-like heads instead of tight ones.
On the flip side, prolonged cold can trick young plants into bolting early.
3. Sunlight and Soil Quality
Broccoli needs at least 6 hours of direct sun to grow a solid head.
Rich, well-drained soil with plenty of organic matter keeps growth steady, and a pH between 6.0 and 7.0 is ideal.
Poor soil means a longer, slower path from planting to harvest.
How to Time Your Broccoli Planting
Timing is everything with this crop, and it directly affects how long broccoli takes to grow in your garden.
Most gardeners plant broccoli in early spring for a summer harvest or in late summer for a fall crop.
Broccoli tolerates light frost, so a fall planting often produces the biggest, tightest heads.
Start seeds indoors about 6 to 8 weeks before your last frost date, then set transplants out while the weather is still cool.
If you’re in a hot climate, skip spring planting and go straight for fall, since heat is the main enemy of quality heads.
So, How Long Does a Broccoli Take to Grow?
Broccoli takes about 70 to 100 days to grow from transplant to harvest, depending on the variety and conditions.
Seed germination adds another 7 to 14 days, and indoor seedling time adds a few weeks more if you’re starting from scratch.
Give your broccoli cool weather, full sun, rich soil, and steady moisture, and you’ll stay right on schedule.
Hope this guide has answered your question about how long a broccoli takes to grow and helped you plan your tastiest harvest yet.