Sowing Guide

How to Sow Blue Sapphire Trailing Lobelia Seeds

How to Sow Blue Sapphire Trailing Lobelia Seeds

A popular selection for a hanging basket, window box, or summer container. Sapphire lobelia is pretty in appearance. The white eyed flowers maintain a striking sapphire blue colour, within foliage which deepens in a bronzy-green shade as the plants mature; forming a spectacular aesthetic when planted among similar shades or, a variety of primary colours. With a growth in height up to 5in, and a trail of 25in, this versatile flower could also be a great addition to tubs and rockeries.

Growing Blue Sapphire Lobelia from Seed

  • Lobelia seeds are very small. For better handling, add some horticultural sand to the provided bag.
  • In a fine seed compost, sow 4-8 weeks prior to the last frost and under cover with warmth between 18-24C (65-75F) in temperature.
  • Sow the seeds on the surface and gently firm down into the compost – keeping the soil damp, not wet.
  • To retain humidity, and save watering when young, it could be helpful to seal in a polythene bag after sowing.
  • Do not exclude light, grow in sun to partial shade.
  • Germination takes 10-21 days depending on temperature.
  • When seedlings are large enough to handle, transfer bunches into trays and continue to grow in cooler conditions,
  • Ensure a gradual acclimatization to an outdoor climate, placing outdoors for a short time, 10-15 days before planting out after all risk of frost in moist soil, a sunny spot, and spaced 10cm (4in) apart.

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