When to sow Borage seeds in the UK – planting guide for Borage plants

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They are native to Mediterranean regions and are now for their edible flowers. Borage plants produce these beautiful flowers and are surprisingly easy to grow in comparison to many outdoor garden plants, making them popular in gardens across the UK.

When should I sow borage seeds?

You should sow seeds outdoors in the springtime, once all danger of frost has passed for the next few months.

Alternatively, you can start them indoors three to four weeks after the last frost.

Borage only takes about eight weeks to mature, so you can succession plant throughout the spring and summer seasons.

How should I plant borage seeds?

Before you plant your borage seeds, you should do some prep work on the soil.

While it’s generally a not-so-fussy plant, they do need well-drained soil to grow healthily.

You may need to work in some compost, well-rotted manure, peat moss, or sand into the patch of soil you plan to plant in to improve drainage.

If you are planting in a container, it needs to be 12 inches wide and deep to accommodate the taproot, and it will also need at least one draining hole in the bottom.

In terms of sunlight, borage’s won’t wilt if you plant them in part shade – but they certainly do best in direct sunshine.

Borage seeds should be planted 1/4 to 1/2 inches deep in the soil.

Sow on or two seeds per seed cell, then cover with soil.

Use a fine spray head on a watering can to avoid disturbing the seeds.

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How do I look after borage plants?

Before they germinate, you will need to keep the soil moist but not waterlogged.

Soil should be slightly damp and stick together, but if you squeeze a handful no water should drip out.

Within two weeks of planting, seedlings should begin to appear above the soil.

Once you see the true leaves you can ease up on the watering and leave the surface to dry out between waterings.

The top two inches of the soil are okay to dry out – but once they are done, water again.

Once fully mature, they grow to a height of about two feet and have bright blue flowers formed in a distinctive star shape.

The stems are deep pinkish-red in colour and are covered in fuzz which stays from when it is young.

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