Yes, growing leeks in containers works great if you pick the right setup for your space. Your pots need to be at least 18 inches (45 centimeters) deep for good root growth. With the right care, container leeks grow almost as thick as plants in garden beds.
I grew King Richard leeks in large fabric pots on my deck last summer to test this method. The stems reached nearly an inch thick by harvest time in late fall. I had to water daily during hot weeks to keep them happy. But the results came close to my garden beds. The deck leeks even had fewer pest problems than my in-ground plants did.
My second season with leeks in pots taught me about feeding needs for container crops. Container plants burn through nutrients faster than garden plants do in the ground. I switched to weekly liquid feeds and saw much better growth that year. The stems got thicker and the leaves stayed dark green all season long.
Container depth matters because leeks need 18-24 inches (45-60 centimeters) of root space below ground to grow well. You also need room above the soil line to pile dirt for blanching as plants grow. Short pots force roots to crowd together in a small space. This leads to thin stems no matter how well you water and feed your plants.
Bonnie Plants says to use pots at least 18 inches (45 centimeters) deep for good results. They also note that keeping moisture steady matters even more in pots than in garden soil. Container soil dries out faster from all sides since air touches more surface area. One missed watering can set your plants back for weeks.
The best container leek varieties are fast growers that stay compact in their growth habit. King Richard and Tadorna both work well in pots for most gardeners. They mature in 70-80 days and do not grow as tall as winter types do. Baby leek varieties also shine in containers since you harvest them young.
Set up your containers for success by using 5-gallon (19 liter) pots at minimum for each plant. Fill them with quality potting mix that drains well but holds some water between waterings. Add slow-release food at planting time for steady nutrients. Then feed with liquid plant food each week once stems start to bulk up.
Patio leeks fit into small spaces that cannot hold a full garden bed in your yard. A cluster of three pots gives you a dozen leeks for fall soups and stews without much space. Put the pots where they get at least 6 hours of sun during the day. Move them to follow the light if your deck or patio has shifting shade through the day.
Read the full article: Growing Leeks: Beginner-Friendly Guide to Sweet Harvests
