Broccoli Seeds – Brassica oleracea var. italica
Brassica oleracea var. italica • Brassicaceae • Native to Mediterranean region
Broccoli Seeds grow into cool-season plants producing dense, green flower heads and tender stalks. A reliable choice for vegetable gardens, raised beds, containers, and fresh home cooking.
Plant name: Broccoli Seeds
Quantity: 100
Selected: Broccoli Seeds / 100
Germination depends on soil, temperature, moisture, and care. See our return policy for details.
At a glance
Broccoli is highly sensitive to heat during head formation, and temperatures above 75 degrees Fahrenheit can cause premature bolting or loose, poorly formed heads, so timing your planting around your local frost dates is critical.
Botanical profile
Meet the Broccoli – Brassica oleracea var. italica
Step-by-step planting
Growing broccoli from seed is straightforward when you align your timing with the plant's preference for cool, stable weather and give it the fertile, well-drained soil it needs to thrive.
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1
Time Your Planting
For spring crops, start broccoli seeds indoors 6 to 8 weeks before your last expected frost date, or direct sow in late summer for a fall harvest when temperatures are cooling back into the 50 to 65 degree Fahrenheit range.
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2
Prepare Your Soil
Broccoli soil requirements lean toward rich, well-draining ground with plenty of organic matter worked in, so amend your bed with compost before transplanting or direct sowing to give roots a nutrient-dense environment from the start.
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3
Sow Your Seeds
Press broccoli seeds about one quarter to one half inch deep into moist seed-starting mix or garden soil, spacing seeds roughly 3 inches apart if direct sowing, with plans to thin to 18 inches once seedlings are established.
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4
Support Germination
Broccoli germination is influenced by soil temperature, moisture consistency, and ambient conditions, and seeds tend to sprout most reliably when soil stays between 65 and 75 degrees Fahrenheit with even moisture but no waterlogging.
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5
Transplant Carefully
When starting indoors, harden off seedlings over 7 to 10 days by gradually increasing outdoor exposure before transplanting to their final garden spot after the risk of hard frost has passed.
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6
Water and Feed Consistently
Broccoli needs about 1 to 1.5 inches of water per week and benefits from a nitrogen-rich fertilizer applied once plants are established, since consistent feeding supports the steady leafy growth that precedes head development.
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Harvest at the Right Moment
Broccoli days to harvest typically range from 60 to 100 days depending on the variety and conditions, and you should cut the main head when it is firm, deep green, and tightly budded, before any yellow flowers begin to open.
Year-round care
Spring
- Sow after last frost
- prepare soil with compost
Summer
- Water regularly
- feed monthly
Fall
- Harvest before frost
- store well
Winter
- Rest
- store seeds cool and dry
Full specifications
Shipping
- Orders are delivered within 8 to 16 business days.
- All orders include tracking.
- Free shipping on all orders.
- Seeds are packed in moisture-resistant, resealable foil packets.
Germination
Germination rates vary depending on climate, soil conditions, and care. Seeds perform best when planted in the right season at the correct temperature, with consistent moisture and adequate light. We take quality seriously and each batch is tested before packaging. If you have concerns about your seeds, reach out and we will do our best to help.
Frequently asked
Questions about Broccoli Seeds – Brassica oleracea var. italica
When should I plant broccoli seeds?
Broccoli is a cool season vegetable that performs poorly in summer heat, so timing is everything. For spring planting, start seeds indoors 6 to 8 weeks before your last frost date and transplant out while nights are still cool. For fall harvests, count backward from your first expected fall frost by the variety's days to harvest, then sow accordingly, usually in mid to late summer.
How deep do I sow broccoli seeds?
Sow broccoli seeds about one quarter to one half inch deep, whether you are starting them in seed trays or direct sowing into the garden. Planting too shallow can expose seeds to drying out, while too deep may slow emergence. Cover lightly with soil or seed-starting mix and keep the surface consistently moist until sprouts appear.
How long does broccoli take to germinate?
Broccoli germination timing varies depending on soil temperature, moisture, and overall growing conditions, so there is no single answer that applies universally. Under favorable conditions with soil temperatures between 65 and 75 degrees Fahrenheit, many gardeners see sprouts in 5 to 10 days. Cooler or inconsistent conditions can slow this considerably, so patience and steady moisture management matter more than any fixed timeline.
What soil pH does broccoli prefer?
Broccoli grows well in soil with a pH between 6.0 and 7.0, with a sweet spot around 6.5 for most varieties. Slightly acidic to neutral soil supports good nutrient availability and also helps suppress clubroot, a fungal disease that thrives in more acidic conditions. If you are unsure of your soil pH, an inexpensive test kit can help you decide whether lime or sulfur amendments are warranted before planting.
Can broccoli be grown in containers?
Yes, broccoli can be grown in containers, though it needs more room than many people expect. Choose a pot at least 12 to 16 inches deep and wide per plant, use a rich, well-draining potting mix, and plan for consistent watering since containers dry out faster than garden beds. Container-grown broccoli is more vulnerable to heat stress, so positioning pots where they receive morning sun and afternoon shade in warmer months can help extend the harvest window.
How do I know when broccoli is ready to harvest?
The main head is ready to cut when it feels firm and dense, the florets are tightly closed and deep green, and the head has reached a good size for the variety. If you notice the buds beginning to loosen or show any yellow color, harvest immediately because the plant is starting to flower and flavor declines quickly after that point. After the main head is cut, watch for side shoots to develop and harvest those while they are still compact for continued production.
Is broccoli safe for pets?
Broccoli is generally considered non-toxic to dogs and cats and is sometimes given in small amounts as a treat. That said, it contains isothiocyanates that can cause mild gastrointestinal upset in dogs if eaten in large quantities, and cats have different digestive tolerances. If you have pets that roam your vegetable garden, it is worth checking with your veterinarian before making broccoli a regular part of their diet.