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Leek (American Flag) Seeds

by Anandi Green's

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Description

How to grow

Technical Details

Growing Conditions

FAQ's

Common Questions & Troubleshooting

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Leek (American Flag) — also known as American Flag Leek, Broad London Leek or लीक / गंडाना — is an exotic bulb and stem vegetable from the Amaryllidaceae family, native to Mediterranean/Near East. This Allium ampeloprasum var. porrum variety grows 40–60 cm tall with an upright habit and is ready to harvest in 100–130 days. Harvest profile: white stalk, dark green leaves; long cylindrical stalk; 20–30 cm usable white stalk. Key highlights: classic heirloom American Flag leek seeds, mild flavour, excellent cold tolerance.

This pack of open pollinated seeds (heirloom) delivers 70–80% germination, with seedlings appearing in 10–14 days. Suitable for gardeners with some experience, Leek (American Flag) grows well on Indian terraces, balconies, raised beds and kitchen gardens. It needs full sun to partial shade, deep, loamy, well-drained, rich in organic matter soil (pH 6.0–7.0) and moderate watering. For container growing, use Geo Fabric Circular Grow Bags or HDPE Rectangular Grow Bags — recommended size: deep 12 inch grow bag recommended.

Sow Leek (American Flag) in India during October–December (Rabi season), when temperatures sit around 13–24°C. Plants keep producing for 4–8 weeks (can stand in ground longer), with an expected yield of 1 stalk (150–250 g) per plant. It is perfect for soups (leek & potato), stews, sautés, garnish and quiches. Grow it alongside carrot, celery and onion family, plus flowers such as marigold — carrot and leek planted together can help confuse each other's pests (carrot fly/onion fly). Looking for a similar crop? See our Red Cabbage (लाल गोभी) Seeds.

Good source of Vitamin K, Vitamin A, folate and manganese. Exotic vegetables like leek are expensive and hard to find fresh in local markets, but they are surprisingly easy to grow at home from seed. Best suited to cool winter climates and hill regions of India. Well-suited states include Himachal Pradesh, Uttarakhand, Jammu & Kashmir and hill regions of Maharashtra/Karnataka.

How to Grow Leek (American Flag)

Leek (American Flag) Growing Season in India

Sow during October–December (Rabi) at 13–24°C. Heat tolerance is low and cold tolerance high, so sowing in this window matters most.

Growing Leek (American Flag) in Pots and Grow Bags

Grows well in Circular Grow Bags or Rectangular Grow Bags on terraces and balconies.

Container: Deep 12 inch grow bag recommended
Spacing: 15 cm between plants; rows 30–40 cm
Method: Transplant
Support: No

Sowing and Germination

Sow thinly 1 cm deep in trays; keep consistently moist; transplant when pencil-thick (15–20 cm tall). Germination: 10–14 days. Transplant at 8–10 weeks. Local sowing calendars: ICAR.

Ongoing Care

Transplant into holes 15 cm deep, gradually backfill/hill soil around stalk to blanch it white; keep well watered; harvest when stalks reach desired thickness. Give full sun to partial shade and moderate water. Feed every 2–3 weeks with compost or bio-fertilisers during leafy growth.

Harvesting Leek (American Flag)

Ready in 100–130 days; keeps producing for 4–8 weeks (can stand in ground longer). Edible part: blanched white stalk and light green leaves.

Companion Planting

Carrot, Celery and Onion family; flowers: Marigold. Carrot and leek planted together can help confuse each other's pests (carrot fly/onion fly).

Common Problems

Watch for thrips, onion fly, rust, bolting in heat. Spray neem oil with a 2 L Spray Pump at dawn or dusk to control sap-sucking pests.

Common Name: Leek

Alternate Names: American Flag Leek, Broad London Leek

Regional / Indian Name: लीक / गंडाना

Variety: American Flag

Vegetable Type: Bulb/Stem Vegetable

Fruit / Vegetable Colour: White stalk, dark green leaves

Fruit Shape: Long cylindrical stalk

Fruit Size: 20–30 cm usable white stalk

Plant Lifecycle: Biennial (grown as annual)

Seed Type: Open Pollinated

Heirloom Status: Yes

Germination Rate: 70–80%

Germination Time: 10–14 days

Days to Maturity: 90–120 days

Days to Harvest: 100–130 days

Sowing Season (India): Rabi

Best Sowing Months (India): October–December

Harvest Season: Winter

Harvest Duration: 4–8 weeks (can stand in ground longer)

Plant Height: 40–60 cm

Plant Spread: 10–15 cm

Growth Habit: Upright, clump-forming

Taste Profile: Mild, sweet, onion-like but subtler

Texture: Tender when cooked, layered stalk

Edible Part: Blanched white stalk and light green leaves

Genus: Allium

Scientific Name: Allium ampeloprasum var. porrum

Plant Family: Amaryllidaceae (Alliaceae)

Native Region: Mediterranean/Near East

Sunlight: Full Sun to Partial Shade

Water Requirement: Moderate, consistent

Soil Type: Deep, loamy, well-drained, rich in organic matter

Soil pH: 6.0–7.0

Temperature Range: 13–24°C

Suitable Climate: Cool season, Subtropical winters

Direct Sow / Transplant: Transplant

Transplanting Age: 8–10 weeks old seedlings

Plant Spacing: 15 cm between plants

Row Spacing: 30–40 cm

Trellis / Support: No

Grow Bag Suitable: Yes (deep 12 inch grow bag recommended)

Container Friendly: Yes (deep container/grow bag)

Beginner Friendly: Moderate

Low Maintenance: Moderate

Heat Tolerance: Low

Cold Tolerant: High

Frost Tolerance: Yes (fairly hardy)

Pest Resistance: Moderate; fairly pest-resistant compared to other alliums

Disease Resistance: Moderate; watch for rust in humid conditions

Common Growing Problems: Thrips, onion fly, rust, bolting in heat

Yield Potential: Moderate

Expected Yield: 1 stalk (150–250 g) per plant

Culinary Uses: Soups (leek & potato), stews, sautés, garnish, quiches

Nutritional Highlights: Good source of Vitamin K, Vitamin A, folate and manganese

Suitable States (India): Himachal Pradesh, Uttarakhand, Jammu & Kashmir, hill regions of Maharashtra/Karnataka

Best Companion Vegetables: Carrot, Celery, Onion family

Best Companion Flowers: Marigold

How long do Leek (American Flag) seeds take to germinate?

Leek (American Flag) seeds germinate in 10–14 days under ideal conditions, with a germination rate of 70–80%. Sow thinly 1 cm deep in trays; keep consistently moist; transplant when pencil-thick (15–20 cm tall).

When should I sow Leek (American Flag) seeds in India?

The best sowing months for Leek (American Flag) in India are October–December (Rabi season). Sowing in this window gives the 13–24°C temperatures the plant prefers.

How many days does Leek (American Flag) take to harvest?

Leek (American Flag) is ready to harvest in 100–130 days from sowing, and keeps producing for 4–8 weeks (can stand in ground longer) with regular picking.

How tall does a Leek (American Flag) plant grow?

Leek (American Flag) grows to 40–60 cm with an upright growth habit and a spread of 10–15 cm.

How much sunlight does Leek (American Flag) need?

Leek (American Flag) needs full sun to partial shade for healthy growth and good yields. Shade tolerance is low-moderate.

Can Leek (American Flag) be grown in a grow bag on a terrace?

Yes — deep 12 inch grow bag recommended. Container friendly: yes (deep container/grow bag). Use a well-draining potting mix enriched with compost.

What does Leek (American Flag) taste like?

Leek (American Flag) has a mild, sweet and onion-like but subtler taste with tender when cooked, layered stalk texture. It is ideal for soups (leek & potato), stews, sautés, garnish and quiches.

What soil pH does Leek (American Flag) prefer?

Leek (American Flag) prefers deep, loamy, well-drained, rich in organic matter soil with a pH of 6.0–7.0. Mix in well-rotted compost before sowing for best results.

What are good companion plants for Leek (American Flag)?

Good companions are Carrot, Celery and Onion family, and flowers such as Marigold. Carrot and leek planted together can help confuse each other's pests (carrot fly/onion fly).

Can I save seeds from my Leek (American Flag) plants?

Yes. Leek (American Flag) is open pollinated, so seeds saved from healthy, fully mature plants will grow true to type if kept away from other varieties that could cross-pollinate.

Should I sow Leek (American Flag) seeds directly or transplant seedlings?

Recommended method: Transplant. Start seeds in a nursery tray and transplant at 8–10 weeks old seedlings.

Why are my Leek (American Flag) seeds not germinating?

The most common causes are sowing outside October–December, soil that is too cold or dry, and sowing too deep. Sow thinly 1 cm deep in trays; keep consistently moist; transplant when pencil-thick (15–20 cm tall).

Why are my Leek (American Flag) seedlings tall and leggy?

Leggy seedlings are stretching for light. Move trays to full sun to partial shade as soon as seedlings emerge and avoid overcrowding.

How do I control pests on Leek (American Flag)?

Leek (American Flag) can be affected by thrips, onion fly, rust, bolting in heat. Inspect leaves regularly, especially the undersides, remove affected parts and apply a neem-based spray in the early morning or evening.

Why are my Leek (American Flag) leaves turning yellow?

Yellow leaves usually point to overwatering, poor drainage or a nutrient shortage. Keep soil evenly moist but never waterlogged, and feed with compost or organic fertiliser every few weeks.

Can Leek (American Flag) grow in partial shade?

Leek (American Flag) performs best in full sun to partial shade. With shade tolerance rated low-moderate, plants in shade grow slower and yield less.

How often should I water Leek (American Flag)?

Water requirement is moderate, consistent. Water when the top 2–3 cm of soil feels dry — usually every 1–2 days in summer and less often in cool or cloudy weather.

Can Leek (American Flag) tolerate Indian summer heat?

Heat tolerance is low. In very hot months, give afternoon shade, mulch the soil and water early in the morning to reduce stress.

What diseases affect Leek (American Flag) and how can I prevent them?

Disease resistance is moderate; watch for rust in humid conditions. Space plants for good airflow, water at the base instead of over the leaves, and remove infected leaves promptly.

Why is my Leek (American Flag) flowering too early?

Early flowering (bolting) is triggered by heat, long days and water stress. Sow only in the October–December window, keep soil evenly moist and harvest promptly once leek reaches usable size.

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This refund policy states that once an order has been delivered to and accepted by the customer, it cannot be refunded. However, if the customer believes that the order does not meet the specified requirements, they are required to contact the customer care team within 24 hours of receiving the order.

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It's important for customers to read and understand the refund policy to know their rights and responsibilities when it comes to requesting refunds or addressing issues with their orders.

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Cancellation Timeframe: Customers can request a cancellation within 24 hours of placing an order. Cancellation requests made after this time period may not be entertained.
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