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Many growers who like lobelia find it too troublesome to grow because of the very small seeds. But, according to knowledgeable florists growing from lobelia seeds not as difficult as it sounds.
First you need to prepare a light substrate, which consists of a mixture of fertile garden soil, sand and vermiculite. Lobelia seeds, like many small seeds, are sown by amateur gardeners on a thin layer of snow, previously placed in a container with soil. On such a snow-white surface, dark small seeds are much easier to distribute than on dark soil. After evenly distributing the seeds, it is advisable to cover the container with a transparent film and put it in a warm, lighted place for their germination.
Growing from lobelia seeds in this way makes it possible, without much hassle, to get a lush hat covered with small flowers over time.
Seedlings appear days in 10-15. Water them in moderation, keeping an eye on the constant moisture content of the substrate. It is advisable to add a weak solution of potassium permanganate to the water, since seedlings are often affected by the "black leg".
After the emergence of seedlings in 10-15 days, they can be fed with complex fertilizer.
Since the seedlings are very small, they dive several pieces into one container. So they look much more spectacular and grow much faster. In order for the lobelia to branch better, after planting in a permanent place, it is pinched several times.
Lobelia blooms almost all summer, when pruning faded inflorescences - until early November. In sunny places its flowering is more abundant.