UrbanHarvests Co - Product Details

🧅 White Onion ‘Presto’ (Seeds) UH-2024APST036

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£1.99 - £3.1

Early and fast-growing, White Onion ‘Presto’ produces crisp, sweet white bulbs ideal for fresh salads, cooking, and pickling. Perfect for spring sowing and summer harvests.

Categories: Vegetable Seeds / Organic Seeds / PlantPal Seeds Brand: Urban Harvest Co SKU: UH-2024APST036

Seed Quantity:

Seed Information

Plant Type Vegetable / Bulb
Organic Yes
Growing Difficulty Moderate
Germination Time 10–21 Days
Harvest Time 100–120 Days
Best Season To Grow Late Winter to Spring
SunLight Needs Full Sun
Water Requirements Medium
Height Of Maturity 30–45 CM
None GMO Yes
UK Native No

‘Presto’ is a reliable, quick-maturing white onion variety, grown from seed for early and flavourful results. It forms smooth, round white bulbs with a clean, mild flavour—perfect for raw use in salads, garnishes, or for light cooking. Its rapid growth makes it an excellent choice for gardeners wanting an early onion crop.

Presto thrives in full sun and well-drained soil. It's suitable for raised beds, allotments, and larger containers. Best sown in spring for harvesting through summer and early autumn. The bulbs store for a shorter period than red or yellow onions but offer excellent eating quality when fresh.

Type: Early white onion
Bulb Shape: Round, smooth, white
Flavour: Mild, sweet, crisp
Sowing Time: February–April (indoors) or March–April (outdoors)
Harvest Time: July–September
Spacing: 10–15 cm apart
Grows Well In: Beds, raised rows, deep containers
Best Uses: Salads, fresh garnish, light cooking, pickling

For crisp, sweet white onions that are ready early in the season, White Onion ‘Presto’ is a top choice for the productive organic kitchen garden.

Growing Instructions

🧅 White Onion ‘Presto’ (Seeds) – Grow & Care Guide

An Early-Maturing White Onion with Crisp Texture and Mild Flavour
‘Presto’ is a high-quality, fast-maturing white onion that produces round, firm bulbs with mild, sweet flavour — ideal for salads, salsas, and cooking. These seeds are suitable for spring sowing and provide excellent yields with good storage potential.

🛒 What You’ll Need:

White Onion ‘Presto’ seeds

Seed trays or modules for early sowing

Peat-free compost

Garden bed, raised bed, or large container

Watering can, rake, and netting (optional)

🌿 Growing & Care Instructions

1. Sowing Indoors (Best Jan–Mar)

Sow 1cm deep in seed trays or modules.

Place in a bright spot (15–20°C).

Water lightly and keep compost moist but not waterlogged.

Alternatively, sow direct outdoors from Mar–Apr.

2. Germination

Germinates in 10–21 days.

Once seedlings are 10–15cm tall, harden off for outdoor planting.

3. Transplanting

Plant out in Apr–May after last frosts.

Space 10–15cm apart, in rows 25–30cm apart.

Choose an open, sunny position with fertile, free-draining soil.

4. Growing On

Water during dry spells and keep well-weeded.

Avoid excessive nitrogen — promotes lush growth but poor bulbs.

Optional: use netting to deter birds pulling young plants.

5. Harvesting

Harvest Jul–Aug when leaves begin to yellow and fall over.

Allow bulbs to dry in the sun for 1–2 weeks.

Store in a cool, dry, well-ventilated space.

Fast, crisp, and full of flavour — White Onion ‘Presto’ brings brightness and bite to every dish.

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🧅 White Onion ‘Presto’ (Seeds) UH-2024APST036

Seed Information

Growing Instructions

🧅 White Onion ‘Presto’ (Seeds) – Grow & Care Guide

🛒 What You’ll Need:

White Onion ‘Presto’ seeds

Seed trays or modules for early sowing

Peat-free compost

Garden bed, raised bed, or large container

Watering can, rake, and netting (optional)

🌿 Growing & Care Instructions

1. Sowing Indoors (Best Jan–Mar)

Sow 1cm deep in seed trays or modules.

Place in a bright spot (15–20°C).

Water lightly and keep compost moist but not waterlogged.

Alternatively, sow direct outdoors from Mar–Apr.

2. Germination

Germinates in 10–21 days.

Once seedlings are 10–15cm tall, harden off for outdoor planting.

3. Transplanting

Plant out in Apr–May after last frosts.

Space 10–15cm apart, in rows 25–30cm apart.

Choose an open, sunny position with fertile, free-draining soil.

4. Growing On

Water during dry spells and keep well-weeded.

Avoid excessive nitrogen — promotes lush growth but poor bulbs.

Optional: use netting to deter birds pulling young plants.

5. Harvesting

Harvest Jul–Aug when leaves begin to yellow and fall over.

Allow bulbs to dry in the sun for 1–2 weeks.

Store in a cool, dry, well-ventilated space.

Fast, crisp, and full of flavour — White Onion ‘Presto’ brings brightness and bite to every dish.

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UrbanHarvests

🧅 White Onion ‘Presto’ (Seeds) UH-2024APST036

Seed Information

Growing Instructions

🧅 White Onion ‘Presto’ (Seeds) – Grow & Care Guide

🛒 What You’ll Need:

White Onion ‘Presto’ seeds Seed trays or modules for early sowing Peat-free compost Garden bed, raised bed, or large container Watering can, rake, and netting (optional)

🌿 Growing & Care Instructions

1. Sowing Indoors (Best Jan–Mar)

Sow 1cm deep in seed trays or modules. Place in a bright spot (15–20°C). Water lightly and keep compost moist but not waterlogged. Alternatively, sow direct outdoors from Mar–Apr.

2. Germination

Germinates in 10–21 days. Once seedlings are 10–15cm tall, harden off for outdoor planting.

3. Transplanting

Plant out in Apr–May after last frosts. Space 10–15cm apart, in rows 25–30cm apart. Choose an open, sunny position with fertile, free-draining soil.

4. Growing On

Water during dry spells and keep well-weeded. Avoid excessive nitrogen — promotes lush growth but poor bulbs. Optional: use netting to deter birds pulling young plants.

5. Harvesting

Harvest Jul–Aug when leaves begin to yellow and fall over. Allow bulbs to dry in the sun for 1–2 weeks. Store in a cool, dry, well-ventilated space. Fast, crisp, and full of flavour — White Onion ‘Presto’ brings brightness and bite to every dish.

Similar Products

My Cart

My Wishlist

White Onion ‘Presto’ seeds

Seed trays or modules for early sowing

Peat-free compost

Garden bed, raised bed, or large container

Watering can, rake, and netting (optional)

Sow 1cm deep in seed trays or modules.

Place in a bright spot (15–20°C).

Water lightly and keep compost moist but not waterlogged.

Alternatively, sow direct outdoors from Mar–Apr.

Germinates in 10–21 days.

Once seedlings are 10–15cm tall, harden off for outdoor planting.

Plant out in Apr–May after last frosts.

Space 10–15cm apart, in rows 25–30cm apart.

Choose an open, sunny position with fertile, free-draining soil.

Water during dry spells and keep well-weeded.

Avoid excessive nitrogen — promotes lush growth but poor bulbs.

Optional: use netting to deter birds pulling young plants.

Harvest Jul–Aug when leaves begin to yellow and fall over.

Allow bulbs to dry in the sun for 1–2 weeks.

Store in a cool, dry, well-ventilated space.

Fast, crisp, and full of flavour — White Onion ‘Presto’ brings brightness and bite to every dish.