When to Plant Broccoli Raab in Ferndale, Pennsylvania (18921)

Location

Ferndale, Pennsylvania

ZIP Code

18921

USDA Zone

Last Frost

Wednesday, April 15, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Wednesday, March 4, 2026

Based on last frost Wednesday, April 15, 2026 · Zone 6b

Pro tip: Sow Broccoli Raab directly outdoors 6 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Brassica rapa subsp. rapa

Days to Maturity 60 days

Mature Height 12-24"

Spread 8"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

6" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 4-7 days

Ready to Plant Broccoli Raab in Ferndale?

Get your seeds now so they're ready by Wednesday, March 4, 2026.

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🤝 Good Companions

OnionBeetCelery

⚠️ Avoid Planting Near

TomatoPepperStrawberry

🤝

Full Companion Planting Guide for Broccoli Raab

See which plants help Broccoli Raab thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow plants to flower fully and seed pods to turn tan and dry.

Processing

Thresh dried stalks, winnow to separate seeds from pod fragments.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Brassica rapa — crosses with turnip, bok choy, and napa cabbage. Isolate by 300 feet.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 4 per sq ft of Broccoli Raab. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Broccoli Raab in Ferndale, Pennsylvania? +

In Ferndale (Zone 6b), direct sow Broccoli Raab outdoors around Wednesday, March 4, 2026.

What is the last frost date for Ferndale, Pennsylvania? +

The average last spring frost date for Ferndale, Pennsylvania (ZIP 18921) is around Wednesday, April 15, 2026. This is based on NOAA climate normals for USDA Zone 6b.

How long does Broccoli Raab take to grow? +

Broccoli Raab typically matures in about 60 days from direct sowing. In Ferndale, that means you can expect harvest around Wednesday, March 4, 2026 plus 60 days.

Should I start Broccoli Raab indoors or direct sow in Pennsylvania? +

Broccoli Raab does best when direct sown outdoors. In Ferndale, sow directly around Wednesday, March 4, 2026.

📚 More Broccoli Raab Planting Guides

🗺️

Broccoli Raab in Pennsylvania

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 6b Broccoli Raab Guide

All cities in your zone · Avg dates

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Other Plants for Ferndale

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Growing Broccoli Raab in Zone 6b

Broccoli Raab (Brassica rapa subsp. rapa) is a popular garden vegetable. In Ferndale, Pennsylvania, which is in USDA Hardiness Zone 6b, you should direct sow seeds around Wednesday, March 4, 2026.

Your average last frost date is Wednesday, April 15, 2026. Broccoli Raab grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.