Germinating the seeds
If you have germinated small seeds of other Gesneriads before, you may use the same method that worked for you.
Getting started -- Plant your seeds when you receive them for best results.
You may plant them in a single pot, or use several pots. Either way, they should be at least 2 inches (5 cm) tall and have drainage holes.
A typical soil mix for germinating them is 3 parts potting soil to 2 parts perlite or coarse sand. An alternate mix is equal parts of coir fiber (or peat moss) and perlite, with some slow-release fertilizer added. Don't add lime to the mix.
The seeds are small, so work in a well-lit area. Fill the pots with soil and sprinkle the seeds evenly in the pots, at least 1/4 inch (1 cm) from each other.
If you have long-fiber sphagnum moss (not ground peat moss), sprinkle a little over the surface. This helps retain moisture around the seeds while allowing light to reach them, which aids germination. This photo shows how much moss to use. If you don't have sphagnum moss, sprinkle some of your soil mix over the surface. Then add water until everything is evenly moist.
Until the seeds sprout, ensure that the soil surface never dries out. You can maintain high humidity by enclosing the pots in a plastic container or bag - just leave it open a crack to let in fresh air. Once or twice a day, drip a few drops of water on the surface to keep it moist.
The seeds germinate well between 68-80 degrees F (20-27°C) during the day, and a little cooler at night. I don't have experience germinating them outside this temperature range. I recommend placing a minimum/maximum thermometer near the pots.
Place the containers in a bright spot out of direct sun. A fluorescent or LED bulb kept 4 inches (10 cm) above them provides the right amount of light.
They should start sprouting in 3-4 weeks, but may take up to 6 weeks. Continue dripping water on the soil surface the first month after they sprout, since young seedlings have a small root system.
When the seedlings are 2 months old, you may carefully pull them and transplant them, or cut off any slower ones, and leave 1 strong seedling in each pot.
Fertilizing -- When they are a week old, give a very light dose of liquid fertilizer (about 1/8 strength), and repeat each week. Hydroponic fertilizer is ideal for young seedlings, since it is easily absorbed and complete. After 2 months, you may switch to an ordinary granular fertilizer, feeding about every 2 months.
Watering -- Once the seedlings are a month old, you may stop keeping the soil surface moist at all times. Aim to keep the rest of the soil evenly moist (but not soggy).
Lighting -- It likes bright, filtered light, with protection from strong sun.
Climate -- This is a tropical species that wants mild to warm conditions all year. It grows well for me indoors with day temperatures in the mid-70s (24°C) and nights in the mid-60s (18°C). It probably will be unhappy below 50° F (10°C), and i doubt it can survive frost. It likes bright, filtered light, with protection from strong sun. Indoors, keep the humidity above about 50%, perhaps with the use of an ultrasonic humidifier if necessary.
If you have any questions or problems, please email me.
Have fun growing them!
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