SproutSmart
SproutSmart Intelligent Garden Sowing

Zone 4b Planting Schedule

Last spring frost: May 13th
First fall frost: Sep 27th
Growing season: 137 days

Action Plan: August in Zone 4b

Expert Note

August in Zone 4b is warm and often dry, so keep soil evenly moist, especially for transplants and fast growers. Mulch to reduce evaporation and watch for late-season pests like aphids and squash bugs; remove damaged leaves early.

Seed & Soil

In August, focus on quick, heat-tolerant crops and short-cycle greens. Direct sow New Zealand Spinach and Clove Basil for steady harvests, and start Radish if it’s in your list. If you have space, transplant Lettuce for fall growth.

The Harvest

Harvest Beauregard and Red Kuri as they finish sizing up, and keep picking Marketmore 76 to maintain production. Pull Allgold and Albion when tops fade and skins set, then cure promptly for best storage.

Planting Schedule

Add crops from the list below to build your planting schedule.
Crop Indoor Start Transplant / Sow Harvest Window
Artichoke Feb 18th Apr 29th Sep 26th – Sep 27th
Giant Red Celery Feb 18th Jun 24th Sep 22nd – Sep 27th
Green Sleeves Feb 18th Jun 24th Sep 22nd – Sep 27th
Gros Vert de Laon Feb 18th May 6th Aug 4th – Sep 27th
Kojak Feb 18th Apr 29th Aug 27th – Sep 27th
Verina Feb 18th Apr 1st Jul 10th – Sep 27th
African Sunset Mar 4th May 13th Aug 11th – Sep 27th
Alabaster Mar 4th May 6th Sep 3rd – Sep 27th
Albin Mar 4th May 6th Sep 3rd – Sep 27th
Amsterdam Mar 4th May 6th Jul 30th – Sep 27th
Amsterdam Cutting Mar 4th May 13th Jul 22nd – Sep 27th
Amsterdam Seasoning Mar 4th May 6th Jul 15th – Sep 27th
Apollo Mar 4th May 6th Sep 3rd – Sep 27th
Artichaut de Nice Mar 4th May 6th Sep 3rd – Sep 27th
Artichoke de Marseille Mar 4th Jun 24th Sep 22nd – Sep 27th
Atlas Angel Mar 4th May 6th Jul 15th – Sep 27th
Baby Artichoke Mar 4th May 6th Jul 30th – Sep 27th
Balder Mar 4th May 13th Aug 26th – Sep 27th
Bandit Mar 4th May 6th Sep 3rd – Sep 27th
Beijing White Mar 4th May 6th Jul 25th – Sep 27th
Bing Select Mar 4th Apr 29th Jul 8th – Sep 27th
Blue Solaise Mar 4th May 6th Aug 24th – Sep 27th
Bordeaux Mar 4th May 13th Jul 27th – Sep 27th
Bullseye Salmon Mar 4th May 6th Jul 15th – Sep 27th
Cabernet Mar 4th May 6th Aug 24th – Sep 27th
Carmen F1 Mar 4th May 6th Aug 19th – Sep 27th
Cascade Blue Mar 4th May 13th Jul 22nd – Sep 27th
Catanese Mar 4th Jul 8th Nov 5th – Sep 27th
Celebration Mar 4th Apr 29th Jul 18th – Sep 27th
Cherokee Sunset Mar 4th May 13th Jul 22nd – Sep 27th

Frequently Asked Questions


What are the frost dates for Zone Zone 4b?
In Zone Zone 4b, the average last spring frost is May 13th and the average first fall frost is Sep 27th.
When is the best time to start seeds indoors in Zone Zone 4b?
The best time to start most seeds indoors is 6 to 8 weeks before your last spring frost date of May 13th.
How long is the growing season in Zone Zone 4b?
Zone Zone 4b has a growing season of approximately 137 days.