Description
It’s recommended that you grow zinnia from seed right in the garden bed, as they do not like to be transplanted and do not often thrive. From seed, they will grow very quickly in the right conditions.
- Zinnias are sensitive to frost, so do not seed until the last frost has passed.
- Zinnias will grow in a minimum daytime temperature of about 60°F (16°C), though a range of 74–84°F (23–28°C) is preferred.
- Sow a round of seeds every week or so for several weeks to extend the flowering period.
- Choosing a location that gets full sun is essential.
- Good air circulation will help to prevent foliar diseases such as powderey mildew later in the season.
- Zinnias are adaptable to most soil conditions, but the ideal soil will be rich in organic matter and well-drained.
- Soil pH should be between 5.5 and 7.5.
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