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How to sow zinnia seeds outdoors

If you’re looking to grow flowers for vibrant summer colour, look no further than zinnias. With so many zinnia varieties available, it’s no wonder they’re such a popular cut flower.

Zinnias can be sown indoors from February to April, but can also be sown outside in May. Just choose a fertile, weed-free area, whether it’s a gap in a border or a patch of bare soil, and get sowing.

Once they’re in bloom you can expect a profuse display of summer colour up until the first autumn frosts.

Learn how to sow zinnia seeds outdoors, below.

You Will Need

Step 1

Rake weed-free soil to a fine, crumbly consistency. Use a taut string to make a straight line and take out a shallow drill.

How to sow zinnia seeds outdoors

Step 2

Sow the seeds along the drill, making sure they are 10-15cm apart. Use your hand to fill the drill with soil, lightly covering the seeds.

How to sow zinnia seeds outdoors

Step 3

Water the seeds well, adding a label to the area so you know what you’re growing. Keep the soil most, but not saturated, as seedlings begin to grow, and cover with a cloche.

How to sow zinnia seeds outdoors

Step 4

When seedlings have formed a couple of pairs of leaves, thin them to around 30cm apart. Water frequently in dry weather and keep weed-free.

How to sow zinnia seeds outdoors
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