Thompson & Morgan Carrot Amsterdam Forcing Seed Packet - 1500 Seeds

These fast-growing, quick maturing carrots are perfect for early crops and can be grown under cloc...

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The Thompson & Morgan Carrot 'Amsterdam Forcing' is an ideal choice for home gardeners seeking a fast-growing, sweet-tasting variety perfect for early-season harvests. This heirloom-style carrot produces high-quality, cylindrical roots that are best enjoyed at finger-size, making them a kitchen garden staple. While highly productive and versatile enough for both container and ground gardening, growers must remain vigilant against pests like the carrot fly and avoid over-manuring soil to prevent root distortion.

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Model Part Number23777
BrandThompson & Morgan

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FAQs

Can I grow these in pots?

Yes, 'Amsterdam Forcing' is excellent for container gardening provided the containers are deep enough for the roots to grow.

How long until I can harvest?

This is a fast-maturing variety. Once germinated, expect to harvest within a few weeks depending on your local climate and whether they are forced.

What is the best way to prevent carrot fly?

Cover your carrots with horticultural fleece or fine garden netting immediately after sowing to prevent the flies from laying eggs.

Should I fertilize the soil before sowing?

Avoid fresh manure. Use soil prepared in the previous autumn and ensure it is light and well-drained.

How deep should I sow the seeds?

Sow the seeds at a depth of 1cm (0.5 inches).

What is the recommended spacing?

Sow in drills 30cm apart and thin the seedlings within each row to 5cm apart.

Troubleshooting

Carrot roots are forked or stunted

This is often caused by stones in the soil or using soil that was freshly manured. Ensure the soil is fine and stone-free, and avoid adding fresh manure.

Tops are green at the crown

The crown of the carrot is exposed to sunlight. Earth up the soil around the base of the stems to keep the crown covered.

Poor germination rates

Ensure the soil remains consistently moist during the 10 to 20-day germination period and avoid sowing too deeply.

Pros and Cons

Pros

  • Extremely fast maturation rate
  • Sweet, tender flavor with no woody core
  • Suitable for container gardening in small spaces
  • Excellent for early-season forcing under cloches

Cons

  • Susceptible to carrot fly infestations
  • Requires careful soil preparation to avoid freshly manured ground
  • Needs consistent thinning to prevent stunted root development

Setup, Compatibility & Care

For the best results, select a sunny, weed-free location with light, well-drained soil. Avoid soil that has been freshly manured, as this can cause roots to fork or grow unevenly; instead, prepare the bed in the autumn preceding your spring sowing. Sow seeds thinly at a depth of 1cm in drills spaced 30cm apart.

Once seedlings reach a handleable size, thin them to 5cm apart to allow for proper root expansion. Maintain consistent moisture for germination, but reduce watering once plants are established to prevent excessive leafy top growth. To protect against the carrot fly, use fleece or fine netting over your crop and be diligent about removing all thinnings from the immediate area.