Colleen Potatoes: Growing Scottish Varieties

Colleen potatoes are a well-loved Scottish-bred second early potato variety, valued for their excellent flavour, reliability, and suitability to cooler UK climates. They are a popular choice for gardeners in Scotland and northern parts of the UK, but they grow just as well elsewhere.

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What Are Colleen Potatoes?

Colleen is a second early potato variety with smooth white skin and creamy white flesh. The tubers are oval, uniform, and known for their pleasant flavour and slightly waxy texture. Colleen potatoes hold their shape well when cooked, making them ideal for salads and boiling.

They are best eaten fresh and are not intended for long-term storage.

When to Plant Colleen Potatoes

In the UK, Colleen potatoes are usually planted:

• Late March to early April, once the soil is workable and no longer waterlogged

Colleen performs particularly well in cooler spring conditions. Chitting seed potatoes before planting helps encourage quicker emergence and stronger growth.

How to Grow Colleen Potatoes

Soil Preparation

Colleen potatoes prefer fertile, well-drained soil. Before planting, dig in well-rotted compost or organic matter to improve soil structure and nutrient levels.

Planting Depth and Spacing

• Plant seed potatoes 10–15 cm deep
• Space plants 30 cm apart
• Leave 60 cm between rows

This spacing allows good airflow and room for healthy tuber development.

Earthing Up

As shoots emerge, gradually earth up soil around the stems. Continue earthing up as plants grow to protect developing tubers from light and to improve yields.

Watering

Water regularly during dry spells, particularly when plants are flowering and tubers are forming. Avoid waterlogging, as Colleen potatoes dislike very wet soil.

Feeding

Apply a balanced fertiliser at planting time. Avoid excessive nitrogen, which can encourage leafy growth rather than tuber development.

Growing Colleen Potatoes in Containers

Colleen potatoes grow well in containers:

• Use containers at least 40–45 cm deep
• Fill with free-draining compost
• Earth up gradually as plants grow
• Water consistently, as containers dry out quickly

When to Harvest Colleen Potatoes

Colleen potatoes are usually ready to harvest:

• 13–15 weeks after planting

Harvest when plants are flowering or have just finished flowering. Tubers are best lifted while skins are still thin.

How to Harvest Colleen Potatoes

• Gently loosen soil with a fork
• Lift carefully to avoid damaging skins
• Harvest as needed rather than lifting the entire crop at once

Colleen potatoes are best eaten soon after harvesting.

Common Problems When Growing Colleen Potatoes

• Dry soil reducing tuber size
• Slug damage in damp conditions
• Blight risk is lower due to early harvest but still possible in wet summers

Good spacing and airflow help reduce disease risk.

Best Uses for Colleen Potatoes

Colleen potatoes are ideal for:

• Boiling
• Steaming
• Salads
• Light roasting

They are not suitable for mash or long-term storage.

Why Grow Colleen Potatoes?

• Bred for cooler Scottish conditions
• Reliable second early harvest
• Excellent flavour
• Easy to grow for beginners

Tips for Best Results

• Always chit seed potatoes before planting
• Keep soil evenly moist
• Earth up thoroughly
• Harvest promptly for best flavour and texture