I live in an apartment in São Paulo and I only have a balcony that gets sun for about 3 hours a day. I wanted to grow lettuce, chives, and herbs to use in the kitchen, but I'm not sure if they can grow with that amount of light. Has anyone managed to do this?
With 3 hours of direct sunlight it's tight, but you can definitely do it. Lettuce and chives can handle low light better than most plants, so you've got that going for you. The real issue is they'll grow slower and won't be as lush as they should be. If you want to try anyway, invest in pots with good drainage, use quality soil (like those fertilized bags they sell), and place the pots as close as possible to your light source. Being careful with watering so you don't waterlog them is also essential, because with low light there's less evaporation.
Now, if you want plants that actually thrive in low-light apartments, consider boosting things with artificial lights. There are cheap LED grow panels for hydroponics that you can mount on the wall or put on a stand next to your pots. It's not even as expensive as it sounds. With that you can keep lettuce, chives, parsley, and even some varieties of basil doing well without direct sun. It's a game changer. If you want to start without any extra spending, try putting the pots on your balcony during those 3 hours of sun and move them near the window (even if it's shade) for the rest of the day - not ideal, but it helps.
The real secret is supplementing those 3 hours with artificial light - a simple LED growth panel (the ones they sell for around 50-100 euros) makes all the difference and takes the strain out of the equation. Lettuce and chives really do handle low light better than other plants, but with just 3 hours they're still going to get weak and grow slowly; with a panel on for about 12-14 hours a day you'll get much better results.
As for the rest, choose deep pots for lettuce (around 20cm) and get rid of the partial shade situation by using shelves with the lights on top - that way you use the space well and all your plants get good light coverage.
Lettuce and green onions really do tolerate low light better than other vegetables, so you're not completely lost - but with only 3 hours it'll grow way too slow to be worth it without help. Supplementing with a growth LED changes the game, then you can harvest decent stuff in normal cycles. Besides that, keep an eye on humidity because apartments in São Paulo when it's dry take longer to keep the soil consistently moist, and it dries out fast in a small pot.
Chives and lettuce will grow, but they'll end up weak and take longer than normal - I've tested this at home and noticed the difference once I started rotating the pots every two days to catch more light coming through the balcony door. What nobody mentioned: try putting something reflective behind the plants, like aluminum foil or even an old mirror you're not using, to redirect those 3 hours of sun and make better use of it. Complementing with an LED is really the most effective solution, but before you invest in that, try this simple trick - it costs nothing and sometimes it's already enough to make a difference.
Three hours really is the bare minimum, and most people don't realize that plants with low light get leggy and weak even if they technically grow. What nobody mentioned is that beyond light, you need to compensate with more careful watering - with low luminosity, evaporation is slow and it's easy to overwater without meaning to. If you can add a simple LED panel (even spending around 50-80 euros) it completely changes the game, but honestly, without it your chives and lettuce are going to take twice as long to become usable. Rotating the pots helps, but it's not a miracle when the light baseline is that low.
# People have already mentioned artificial light, which really is the most practical solution. But before you go spending on an LED panel, try something nobody brought up: staggered planting. You do a small batch of lettuce and chives now, let them grow while you start another batch in a separate pot. When the first one is ready to harvest and you pick it, the second one is already gaining strength. That way you're not stuck waiting weeks watching the plant grow slowly and getting discouraged.
Another tip that works: if you're really finding the LED panel expensive, use those cool white LED spotlights they sell for regular home lighting (the ones with 6500K color temperature, which look more like sunlight). Put them about 15-20 cm from the plants and run them for about 12-14 hours a day. It's way cheaper than a plant-specific panel and does basically the same job in your situation. Chives, lettuce, and herbs like parsley do fine with this.
The last thing is to check the soil moisture. With little natural light, water takes longer to evaporate and plants need less of it, but soggy soil will rot the roots. Stick your finger in the soil before watering - only water when it's actually dry. A pot with drainage holes at the bottom helps a lot so you don't create puddles.
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