Bringing you the best advise from the best in the field.
Gary Bachman, PhD, CPH
Certified Professional Horticulturist
How to grow kale in the winter + Kale chip recipe
We’re fully in the cool fall season and that means we can grow delicious and nutritious kale now through the spring season. Kale is one of my all-time favorites and I look forward to growing kale because there are lots of varieties from which to choose (see below).
For the beginning gardener it’s probably easier to buy transplants for the local independent garden center. For the gardener that wants more selection, and then starting from seed is the way to grow.
Deciding where to grow your kale is the next decision, in either raised beds or containers. Always choose a location that receives at least six hours of full sun.
Where to plant your kale?
Container planing
This is the easiest for beginners
Place at porch or patio for easy access and lots of light.
Using professional growing mix, commercial container mixes are engineered to have the proper water holding, porosity for optimum plant growth.
Don’t add compost or other amendments as this will change the engineered properties.
Raised Planting Bed
Be sure and amend the planting soil with fertilizer and lime as recommended by soil testing.
Space the plants about 18-inches apart to allow the full development of the leaves.
Transplants a few weeks before the first frost. In the warmer zones 8, 9 and 10 kale can be transplanted all through the winter season.
Indoors (microgreens)
Use small countertop or window container
LED lights (shop lights will work. Or you can use one of the easy indoor grow systems)
Recommended Kale Varieties
Curly Kale
Scarlet Kale
Vates Blue Scotch
Redbor
Winterbor
Starbor
Flat Kale
Dinosaur or lacinato kale -Black Magic -Black Tuscan
Consistent fertilization is a must for a successful kale harvest, your choice of materials:
Controlled release such as Osmocote - Maintain nutrient available over time
Granular - Fast nutrient release - Multiple applications
Water soluble - fertilize with watering
Organic -Many great products available
Harvesting your kale
Now's the time to reap your reward and harvest your kale. You can harvest kale anytime after germination but depending on what kind of kale you are looking to grow, just make sure you harvest before the plant bolts.
10 to 15 days as microgreens
16 to 24 days as baby
25 to 35 days as mini
60 days as full grown leaves
Full grown kale can be harvested and preserved via canning. Always follow good canning practices. A good resource is available from the USDA here.
One of the most enjoyable ways I like to enjoy home grown kale is by making kales chips. Here is my no fail recipe that has been developed from many years of experimentation.
Gary's kale chip recipe
Preheat oven to 260F (You may have adjust times to get the kale chips exactly how you like them).
Kale of your choice, I like the fringed varieties as they get crispier
Trim the thick mid rib out, it will never get crispy
Lightly coat with EVOO and sprinkle with sea salt, I like the Himalayan Pink salt
Put parchment on your cookie sheet and spread the kale out into a single layer
Put in the oven for about 20 minutes
Mix the kale around and put back in the oven
Turn the oven off and leave the kale in for another 15 minutes
Air Fryer
Prep as above
175F
15 minutes
Gary Bachman, PhD, CPH
Certified Professional Horticulturist
Gary earned his degrees at Clemson University (BS and MS) and The Ohio State University (PhD) and has 30+ years of urban horticulture experience.
Gary was named a Great American Gardener by The American Horticultural Society. Gary and his wife Katie live in Ocean Springs, MS and operate the Heritage Cottage Urban Nano Farm which is designed to be a demonstration urban farm to share tips and tricks for gardening success in small urban spaces.