Shiso, which are known botanically as Perilla frutescens, are a type of herb that can easily be grown at home. Continue reading to learn the basics of growing shiso as well as common mistakes to avoid along the way.
Best Time to Plant Shiso
This will depend largely on your local climate, but as a rule of thumb, begin to plant the shiso seeds directly outdoors in spring or early summer. This is the best time to ensure that the seedlings survive the weather.
To check when shiso are most likely to thrive in your area, see the USDA Plant Hardiness Zone Map. If you live outside the US, do a quick search for ‘plant hardiness zone + [city]’.
How to Plant Shiso the Right Way
There are a number of things to consider that will help you avoid some of the common mistakes of growing shiso in your home garden.
Often overlooked, your soil can have a huge impact on how well your shiso grow. Generally, your soil should be well-drained and fertile, with added organic matter. Soil PH levels should be around 5.5 to 7.0.
1/4″ deep, 24″ apart in rows 36″ apart. 1/4″ deep, 6-12″ apart in rows 18″ apart. The seeds should be sowed at a depth of about 6-12″. For each plant, be sure to sow at least a few seeds to ensure that at least one of them will germinate.
Begin thinning your shiso seedlings 12-18″ apart when seedlings are 2-3″ tall.
How Much Sunlight is Needed to Grow Shiso
The amount of sunlight is another key to a successful harvest. Too much sunlight will dry out your shiso. Not enough sunlight will stunt your its growth or even kill it.
Ideally, your shiso should be getting full sun to partial shade
How Much to Water Shiso
As you’ve figured by now, a lot can have an impact on how well your shiso do, and the amount of water is no different.
Ideally, the soil should be damp to touch; not soggy or bone dry. If the leaves on your shiso begin to change colors or start to look droopy, you need to adjust how much water you’re giving it.
Unfortunately, if you give it too much or too little water, you can kill it, so it’s best to just keep an eye on it and water as needed.
How Long Does it Take Shiso to Germinate and Grow?
Now the fun part begins and you get to watch your shiso grow.
It takes approximately 7-14 days to germinate, and a total of 80-90 days from seed to harvest.
When to Harvest Shiso
The best time to harvest your shiso is when leaves are large enough to use.
Shiso can grow up to about 18-30″ tall.
What Can Shiso Be Used For?
Food Use: great for salads, sushi, and garnishes.
Flavor Profile: minty, slightly sweet, and spicy (green variety); stronger and more pungent (red variety).
Can Shiso Grow in Pots and Containers?
Yes, you can plant 1 plant per 8-12″ container. This can help control weeds and keep your plant from growing out of control.
It also gives you the flexibility to move your shiso around if you need to adjust sunlight or bring it indoors to avoid harsh weather conditions.
Are Shiso Safe for Bees?
Yes, shiso are safe for bees.
According to GreenPeace.org, bees pollinate human food crops that make up about 90% of the world’s nutrition.
Given their importance in our ecosystem and food supply, I feel it is important to note that growing shiso is bee-friendly.
