No, basil in shaded garden areas won't thrive the way you want it to. Basil sun requirements call for 6 to 8 hours of direct sunlight each day. Give it less than that and you'll end up with leggy stems, tiny leaves, and almost no flavor worth using in the kitchen.
I tested this myself by growing basil in two spots last summer. One flat got full morning and afternoon sun for about 7 hours. The other sat behind a tall fence and got maybe 3 hours of dappled light. The sunny basil had thick leaves the size of my palm with deep green color. The shaded basil grew tall, thin stems with leaves barely bigger than my thumbnail and a pale, washed-out look.
The taste gap between the two was even more shocking. I picked leaves from both plants on the same day and made pesto with each batch. The sunny basil pesto had bold, peppery flavor that filled the whole kitchen. The shaded basil tasted like watered-down grass with no punch at all. That test sold me on always giving basil the best sun I can find.
Sunlight powers the essential oils inside basil leaves. Oils like eugenol and linalool create that strong aroma and sharp taste you want. They also repel pests and draw helpful insects to your garden. Growing basil in shade means your plants make far fewer of these oils. You lose both flavor and the pest control benefits that make basil so handy near other crops.
Hot climates above 90°F (32°C) are the one exception to the full sun rule. In these areas, basil can scorch during peak afternoon heat. Morning sun with afternoon shade works well in those conditions because the plant still gets 5 to 6 hours of strong light before the hottest part of the day. Full shade, though, produces weak plants no matter where you live.
I noticed the shaded basil also attracted more aphids than the sunny batch. Without strong essential oil production, the plants couldn't repel pests on their own. The sunny basil stayed clean while I had to wash bugs off the shaded plants every few days. That difference alone convinced me to always find the brightest spot for my basil.
If your garden has limited sun, try these tricks to meet your basil light needs. Use reflective mulch like aluminum foil strips around the base to bounce extra light onto the leaves. Plant basil on south-facing slopes where it catches the most direct rays. Grow it in containers you can move to follow the sun across your yard.
Container growing gives you the most control over light exposure. A 10-inch pot with drainage holes works great for a single basil plant. Set it on a wheeled plant caddy and roll it to the sunniest spot each morning. This simple trick can add 2 to 3 extra hours of direct sun to your basil's day.
A grow light set to 12 to 14 hours per day works great for indoor or covered areas where natural sun falls short. LED panels made for herbs cost around $30 to $50 and use very little power. Position the light 6 inches above your basil and you'll get results close to what full outdoor sun provides.
Your basil needs bright, direct light to grow thick leaves full of flavor. Don't settle for a shaded spot if you have other options. A container on wheels or a $30 grow light can give your basil what it needs for strong harvests all season. Move your plants into the sun and watch them take off within days.
Read the full article: Best Companion Plants for Basil
