Since the nasturtium is not frost-hardy, it may only be sown outdoors after the ice saints from mid-May. If you would like to look forward to an early flowering, then prefer your nasturtiums on the windowsill or in the greenhouse.
- How long does nasturtium take to germinate?
- Can the nasturtium tolerate frost?
- Growing the nasturtiums
Preference in the pot
For growing in a pot, you need some clay pots with a diameter of about 6-10 cm and normal garden soil. If possible, it should be slightly loamy and calcareous and not too rich in nutrients. You may mix some sand into the ground.
Put 2 - 3 seeds in each pot. Cover the seeds with a little soil, because the nasturtium is a dark germ, and water the seeds lightly. Always keep the seeds well moist during the entire germination period.
The best way to do this is to stretch foil over the pot. Alternatively, you can put a mason jar over the cultivation pot. The first seedlings will appear after about 10-20 days.
Find the right strain
When looking for the right variety of nasturtiums, the first thing to think about is the space available. A climbing variety requires far more space than a compact one. After all, the tendrils of the large nasturtium can be up to 3 meters long.
Another criterion in the selection is the light requirement of the plant. Some varieties get along better with a shady location than others. Last but not least, of course, you still have the choice of the flower color. It ranges from traditionally yellow-orange and red to white and pink to purple and black.
The essentials in brief:
- nutrient poor soil
- Keep seeds well moist
- Consider use before sowing
- plant out only after the ice saints
Tips & Tricks
Before sowing, consider whether your nasturtiums are to be eaten or just for decoration, and choose an appropriate variety.