When to Plant Catnip in Gilroy, California (95021)

Location

Gilroy, California

ZIP Code

95021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Tuesday, December 16, 2025

Transplant Outdoors

Tuesday, February 24, 2026

Based on last frost Tuesday, February 10, 2026 · Zone 9b

Pro tip: Start Catnip seeds indoors 8 weeks before your last frost date, then transplant outdoors around Tuesday, February 24, 2026.

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🌿 Plant Details

Scientific Name Nepeta cataria

Days to Maturity 90 days

Mature Height 18-36"

Spread 18"

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Low (less than 1 inch/week)

↔️

Spacing

18" apart

🌱

Planting Depth

0.125" deep

Seeds typically germinate in 7-14 days

Ready to Plant Catnip in Gilroy?

Get your seeds now so they're ready by Tuesday, December 16, 2025.

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🤝 Good Companions

TomatoPepperSquashPumpkin

🤝

Full Companion Planting Guide for Catnip

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

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let flower spikes dry completely on the plant. Seeds form in small nutlets inside dried calyxes.

Processing

Strip dried stems over a bowl, rub between fingers to release seeds, winnow lightly.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Catnip self-sows freely and can become weedy — deadhead most plants to control spread.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Catnip. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Catnip in Gilroy, California? +

In Gilroy (Zone 9b), start Catnip seeds indoors around Tuesday, December 16, 2025 and transplant outdoors around Tuesday, February 24, 2026.

What is the last frost date for Gilroy, California? +

The average last spring frost date for Gilroy, California (ZIP 95021) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.

How long does Catnip take to grow? +

Catnip typically matures in about 90 days from transplanting. In Gilroy, that means you can expect harvest around Tuesday, February 24, 2026 plus 90 days.

Should I start Catnip indoors or direct sow in California? +

Catnip should be started indoors 8 weeks before your last frost date. In Gilroy, that means starting around Tuesday, December 16, 2025.

📚 More Catnip Planting Guides

🗺️

Catnip in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 9b Catnip Guide

All cities in your zone · Avg dates

→

Other Plants for Gilroy

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Growing Catnip in Zone 9b

Catnip (Nepeta cataria) is a popular garden vegetable. In Gilroy, California, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Tuesday, December 16, 2025.

Your average last frost date is Tuesday, February 10, 2026. Plan to transplant your Catnip seedlings outdoors around Tuesday, February 24, 2026, about 2 weeks after your last frost date.