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Antirrhinum Potomac Yellow Seeds produce bright yellow flowers on tall stems suited to sunny beds and cutting. This tall annual Snapdragon flowers best with long days, strong light and warm finishing conditions.
Grow it successfully: Follow the Snapdragon Grow Guide for sowing, regional timing and supported cutting stems.
Quick Grow Facts
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Plant Type: Annual
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General Sowing Time: Plan spring-to-summer flowering with long days and warm nights; follow the guide’s regional timing.
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Position: Full Sun
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Sow Depth: Loose seed: only a light dusting, about 1–2 mm. Pellets: place on the moist surface, wet thoroughly and use at most a light dusting.
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Spacing: 15-20 cm
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Germination: Allow about 7–14 days; timing varies. Aim for 18–21°C and even moisture.
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Height: Up to 1.5 m
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Stem Length: Tall cutting stems; actual length depends on growing conditions and support.
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Harvest: Cut when the lower florets begin opening; timing depends on day length, temperature and establishment.
Why Grow This Variety
- Bright yellow flowers add a distinct colour note to seasonal beds.
- Tall stems make this variety useful for fresh-cut arrangements.
- Potomac suits long days, strong light and warm flowering conditions.
- Allow roughly 7–14 days for germination while checking moisture and temperature; home conditions change timing.
Garden Uses
Use Potomac Yellow in a full-sun border or dedicated cutting patch where its upright stems can add height outdoors and provide flowers for vases.
Growing Notes
- Start under protection where needed, then establish in sun as frost risk passes and days lengthen. Plan flowering for warm nights above about 16°C.
- Match sowing to the seed form: give loose seed only a light dusting; place pellets on the surface, wet thoroughly and keep evenly moist. Follow supplied seed-treatment warnings.
- Space plants 15–20 cm apart in a home border and support tall stems with netting or discreet stakes.
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