How long is the growing season in Zone 5b?

Zone 5b has an average growing season of 154 frost-free days.

Zone 5b Planting Schedule

Q: What are the frost dates for Zone 5b?

In Zone 5b, the average last spring frost is May 4th and the average first fall frost is Oct 5th.

Q: When is the best time to start seeds indoors in Zone 5b?

In Zone 5b, start seeds indoors 6–8 weeks before your average last spring frost (around May 4th). The exact timing varies by crop — check the planting schedule above for crop-specific indoor seed start dates.

Last spring frost: May 4th

First fall frost: Oct 5th

Growing season: 154 days

All Zones Zone 5b Save Garden

Action Plan: August in Zone 5b

Expert Note

In August, keep soil evenly moist and mulch to reduce heat stress. Watch for late-season pests like aphids and squash bugs, and check for powdery mildew on foliage. Water early, avoid wetting leaves, and remove any diseased leaves promptly.

Seed & Soil

In Zone 5b, use August for quick, heat-tolerant successions: direct sow Anise Basil and Thai Basil for steady leaf harvests, and plant Zucchini for fast production. If you have space, transplant Tomato only if you can keep it well-watered and protected from late blight pressure.

The Harvest

Harvest Apple and Apple Gourd as they reach full size and develop good color for storage. Pick Alabama Red and Alabaster regularly at peak tenderness, and keep harvesting Allgold to maintain quality and reduce split or over-ripening.

Planting Schedule

Add crops from the list below to build your planting schedule.

Crop	Indoor Start	Transplant / Sow	Harvest Window
Cynara scolymus 'Italian'	Jan 26th	May 4th	Oct 1st – Oct 5th
Artichoke	Feb 9th	Apr 20th	Sep 17th – Oct 5th
Giant Red Celery	Feb 9th	Jun 15th	Sep 13th – Oct 5th
Green Sleeves	Feb 9th	Jun 15th	Sep 13th – Oct 5th
Gros Vert de Laon	Feb 9th	Apr 27th	Jul 26th – Oct 5th
Kojak	Feb 9th	Apr 20th	Aug 18th – Oct 5th
Verina	Feb 9th	Mar 23rd	Jul 1st – Oct 5th
African Sunset	Feb 23rd	May 4th	Aug 2nd – Oct 5th
Alabaster	Feb 23rd	Apr 27th	Aug 25th – Oct 5th
Albin	Feb 23rd	Apr 27th	Aug 25th – Oct 5th
Amsterdam	Feb 23rd	Apr 27th	Jul 21st – Oct 5th
Amsterdam Cutting	Feb 23rd	May 4th	Jul 13th – Oct 5th
Amsterdam Seasoning	Feb 23rd	Apr 27th	Jul 6th – Oct 5th
Apollo	Feb 23rd	Apr 27th	Aug 25th – Oct 5th
Artichaut de Nice	Feb 23rd	Apr 27th	Aug 25th – Oct 5th
Artichoke de Marseille	Feb 23rd	Jun 15th	Sep 13th – Oct 5th
Atlas Angel	Feb 23rd	Apr 27th	Jul 6th – Oct 5th
Baby Artichoke	Feb 23rd	Apr 27th	Jul 21st – Oct 5th
Balder	Feb 23rd	May 4th	Aug 17th – Oct 5th
Bandit	Feb 23rd	Apr 27th	Aug 25th – Oct 5th
Beijing White	Feb 23rd	Apr 27th	Jul 16th – Oct 5th
Bing Select	Feb 23rd	Apr 20th	Jun 29th – Oct 5th
Blue Solaise	Feb 23rd	Apr 27th	Aug 15th – Oct 5th
Bordeaux	Feb 23rd	May 4th	Jul 18th – Oct 5th
Bullseye Salmon	Feb 23rd	Apr 27th	Jul 6th – Oct 5th
Cabernet	Feb 23rd	Apr 27th	Aug 15th – Oct 5th
Carmen F1	Feb 23rd	Apr 27th	Aug 10th – Oct 5th
Cascade Blue	Feb 23rd	May 4th	Jul 13th – Oct 5th
Catanese	Feb 23rd	Jun 29th	Oct 27th – Oct 5th
Celebration	Feb 23rd	Apr 20th	Jul 9th – Oct 5th

Frequently Asked Questions

What are the frost dates for Zone Zone 5b?

In Zone Zone 5b, the average last spring frost is May 4th and the average first fall frost is Oct 5th.

When is the best time to start seeds indoors in Zone Zone 5b?

The best time to start most seeds indoors is 6 to 8 weeks before your last spring frost date of May 4th.

How long is the growing season in Zone Zone 5b?

Zone Zone 5b has a growing season of approximately 154 days.