Growing Conditions for Indoor Raspberries. Seeds can take anywhere between five and 21 days to germinate, and once that occurs, she advises to put them in a place where they will get direct sunlight at least six hours a day. Also, the container should come with some drainage holes at the bottom. Don't give up the sensory pleasures of homegrown raspberries just because you live in a third-floor apartment. Raspberries need plenty of sunlight. Another important thing to remember in growing raspberries indoors is choosing the right container. How to Grow Raspberries Indoors. The best variety of strawberry to grow indoors would be Alpine strawberries, they don’t expand much (good for space) and produce fruit most of the year. Should I grow strawberries from seed or buy a young plant? When growing feminized seeds indoors under 18+ hours of daily light they grow in a vegetive mode, producing leaves, roots, branches but no buds. Any other type of day-neutral strawberries would also be fine or even choose a variety so they produce fruit at different seasons. If you don’t have good light indoors, it’s common to supplement with grow lights, and Hagerty has even had success with more cost-efficient LED lighting. When the amount of daily light is reduced to 12 hours the plants start to produce buds, this is known as the bloom phase, sometimes called the flowering phase. Depending on the variety, the bloom phase takes around 9 weeks of 12/12 light. Yes (with a couple of steps to assist germination), but why would you want to? The plants need to be placed in a window that receives six to eight hours of unobstructed sunlight a day. You also need to insert some bamboo canes to support the canes of the raspberries. If your plants do not get enough sunlight due to where they’re placed, the may not grow properly and may not bear fruit. The kind of container that you should use is the one with 24 – 36” width and depth.