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How to grow Trailing lobelia in the UK

Clouds of tiny blue flowers that tumble over the edge of pots and hanging baskets.

Trailing lobelia
Photo: Rob Hille ยท Public domain

When to sow, plant and harvest trailing lobelia

Plantmid May to late June
In flowerearly June to late September

Dates are for central England. Sow about two weeks later in the north and Scotland, and up to two weeks earlier in the south and south west. Get the dates for your postcode.

Planting it

  1. Water your new plants in their pots first
  2. Dig a hole a bit bigger than the pot
  3. Tip the plant out gently, holding the leaves, not the stem
  4. Pop it in the hole, firm the soil around it, and water well
  5. Space the plants about 15cm apart each way

Top tips for growing trailing lobelia

Soil and feeding

Poor soil - really!. Nasturtiums flower best in poor soil. Feed them and you get all leaves and no flowers.

Harvesting and eating trailing lobelia

Just enjoy it - trim with scissors if it gets straggly.

Saving your own trailing lobelia seed

.

  1. Not one to save from - buy new plants or seed.

Where to buy trailing lobelia plants

Thompson & Morgan · Suttons · Amazon

These are affiliate links: we may earn a small commission if you buy, at no extra cost to you. Read more.

Trailing lobelia questions

When do I plant out trailing lobelia?

Plant trailing lobelia out from mid May to late June, once the last frost has passed.

When can I enjoy trailing lobelia?

Trailing lobelia is ready from early June to late September. Just enjoy it - trim with scissors if it gets straggly.

How long do trailing lobelia take to grow?

Roughly 4 weeks from sowing or planting until the first harvest.

Are trailing lobelia easy to grow?

Trailing lobelia are rated 'easy peasy' for beginners, and can be grown in the ground or a raised bed or in pots and containers.

Plan your own garden: it tells you what to do and when, for your postcode.

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