Thompson & Morgan Herb Basil Crimson King - 150 Seeds

This 100% purple leaves Basil variety has increased vigour and uniformity with traditional cup sha...

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This guide is for gardeners seeking an attractive and flavorful addition to their herb collection, offering vibrant purple foliage and traditional basil taste. Its key benefit is its dual ornamental and culinary value, making it suitable for both edible gardens and decorative pots. A caveat is its need for specific germination temperatures and consistent moisture. This variety of basil boasts increased vigor and uniform, cup-shaped purple leaves, providing a striking splash of color. It is ideal for containers, baskets, or indoor windowsill growing.

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Model Part Number24069
BrandThompson & Morgan

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FAQs

When is the best time to sow Basil Crimson King seeds?

For outdoor sowing, plant from February to June. You can also sow indoors throughout the year for continuous harvest.

What temperature is needed for basil seeds to germinate?

Basil seeds require a temperature of 15-25°C (59-77°F) for successful germination.

Can I grow this basil indoors?

Yes, Basil Crimson King is ideal for growing on a windowsill indoors, provided it receives sufficient light.

How much sun does this basil variety need?

It thrives in a position of Full Sun.

What is the mature size of Basil Crimson King?

Plants typically reach up to 45cm (18in) in height and 30cm (12in) in spread.

Is this basil suitable for cooking?

Yes, despite its ornamental appearance, it offers a traditional basil flavor and is excellent for culinary use.

What should I do if my seedlings are leggy?

Leggy seedlings usually indicate insufficient light. Move the plants to a brighter location and ensure they are not kept too warm.

Troubleshooting

Seeds not germinating

Ensure consistent temperature between 15-25°C and keep compost lightly moist. Check if seeds are too old or were covered too deeply.

Seedlings are weak or leggy

Provide adequate light. Ensure temperatures are not too high during germination and early growth.

Leaves turning brown or wilting

Check for overwatering or waterlogged soil, which can lead to root rot. Ensure good drainage.

Pests on leaves (e.g., aphids)

Wipe leaves with a damp cloth or use an appropriate organic pest control solution. Ensure good air circulation.

No purple color in leaves

Ensure the plant is receiving adequate sunlight. Some varieties may show less intense color in low light.

Pros and Cons

Pros

  • Adds significant visual appeal with its unique purple foliage.
  • Combines ornamental beauty with practical culinary use.
  • Stronger growth and uniformity compared to some other varieties.
  • Suitable for a range of growing environments, from outdoors to indoors.
  • Provides traditional basil flavor for cooking.

Cons

  • Requires specific germination temperatures (15-25°C) for success.
  • Germination can take 14-21 days, requiring patience.
  • Needs consistent, light watering, especially as seedlings emerge.
  • As a half-hardy annual, it requires protection from frost.
  • Results may vary based on growing conditions and environmental factors.

Setup, Compatibility & Care

Sowing Indoors/Outdoors:

Sow seeds from February to June for outdoor cultivation. For indoor growing out of season, sow throughout the year.

Compost & Germination:

Use a free-draining seed compost. Sow seeds on the surface and cover lightly with compost or vermiculite. Place in a propagator or seal the container in a polythene bag at a temperature of 15-25°C (59-77°F).

Germination Time:

Germination typically takes 14-21 days.

Watering:

Keep the compost slightly moist but not waterlogged. Water very lightly as seedlings emerge.

Transplanting:

Once seedlings are large enough to handle, transplant them into 7.5cm (3in) pots.

Growing Conditions:

Grow on in cooler conditions after transplanting. Basil requires a position in Full Sun to thrive.

Hardiness:

This is a Half-Hardy Annual. Protect from frost.

Mature Size:

Reaches up to 45cm (18in) in height and 30cm (12in) in spread.