🌱 Beetroot Grow Guide

From seed to table—and back to seed again.

Beetroot (Beta vulgaris) is one of those satisfying crops that doesn’t ask for much but gives plenty. Whether you love it roasted, pickled, grated raw into salads, or even juiced, it’s a versatile veggie that deserves a spot in every home garden.

This guide walks you through how to sow beetroot from seed, the differences between tray-sown and direct-sown methods, smart companion planting ideas, and how to save seeds so you can keep growing your favourites year after year.

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🗓️ When to Sow in Australia

Beetroot prefers cooler temperatures for germination and root development, but it doesn’t mind a bit of heat once it’s established. You can grow it in most parts of Australia nearly year-round.

• Temperate & Mediterranean zones (e.g. Sydney, Perth, Adelaide): July to April
• Cool zones (e.g. Tasmania, Canberra, Blue Mountains): September to April
• Arid Zones (e.g. Alice Springs, Mildura): February to December
• Subtropical Zones (e.g. Brisbane, Geraldton): Jan to December
• Tropical zones (e.g. Cairns, Darwin): April to August (during the dry/cool season)

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🏡 Growing From Seed: Trays vs Direct Sowing

🪴 Sowing in Trays

Pros:

• Better control over moisture and temperature during germination
• Less risk of seed loss from slugs or heavy rain
• Easier to keep track of varieties

How-To:

1. Use punnets or seedling trays with good drainage.
2. Fill with seed-raising mix.
3. Sow each seed cluster (they’re actually a dried fruit containing 2–5 seeds!) about 1–2 cm deep.
4. Keep moist but not soggy.
5. Germination usually takes 5–10 days.
6. Harden off seedlings before transplanting when they have 2–4 true leaves (about 3–4 weeks old).

Tips:

• Thin to the strongest seedling before transplanting.
• Beets don’t love root disturbance, so be gentle.

🌱 Direct Sowing

Pros:

• Less transplant shock
• Faster growing once established
• Less time spent potting up or pricking out

How-To:

1. Sow direct into well-prepared, friable soil rich in organic matter.
2. Space seeds (clusters) 10 cm apart in rows 25–30 cm apart.
3. Sow about 1–2 cm deep.
4. Water gently but thoroughly.
5. Once seedlings emerge, thin to 1 strong seedling per cluster.

Tips:

• Soak seeds in water overnight to soften the seed coat and improve germination.
• Keep soil moist until well established.

🌟 Which to choose?
If you’re sowing early in the season when soils are cool, trays give you a head start. But once the weather warms up, direct sowing is easier and often more successful.

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🌿 Soil Preparation & Care

Beets like loose, well-drained soil with plenty of organic matter, but not too rich in nitrogen (or you’ll grow big leaves and small roots).

• pH: 6.0–7.5
• Don’t add fresh manure just before sowing, compost is better.
• Remove stones and clumps as the roots need room to grow smoothly.

🌧️ Watering:
Consistent moisture is key as dry spells can cause woody roots, while overwatering can cause splitting.

🧪 Fertilising:
A light application of seaweed tonic or balanced organic fertiliser every few weeks helps support steady growth.

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🌼 Companion Planting for Beetroot

Beetroot plays well with many garden friends, and a few foes to avoid too.

✅ Good Companions:

• Onions, garlic & leeks: Help deter pests
• Lettuce & leafy greens: Shallow roots don’t compete much
• Cabbage family (broccoli, kale): Grow well alongside beets
• Herbs like dill & mint: Attract beneficial insects

🚫 Avoid Planting With:

• Runner beans or climbing beans: They can stunt beetroot growth
• Field mustard or brassicas: May host similar pests

🌼 Bonus tip: Beet leaves are edible too—use young leaves in salads and larger ones steamed or sautéed. Don’t waste a thing!

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✂️ Thinning & Harvesting

Beetroot seeds often produce multiple seedlings per cluster. Once they’re a few centimetres tall, thin them to the strongest one every 10 cm. Don’t toss the thinnings—they’re tasty in salads!

⏳ Time to Harvest:

• Baby beets: 6 – 8 weeks
• Full size: 10 – 12 weeks

Harvest when roots are about the size of a golf ball to a tennis ball as older roots can get tough.

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🧺 Saving Beetroot Seed

Saving beetroot seed is a bit more involved than with quick crops like lettuce or tomatoes, but it’s deeply rewarding.

❗Important:

Beetroot is biennial, meaning it produces seed in its second year. In frost-free areas, you can leave them in the ground. In cooler regions, lift and store them over winter.

🔁 How-To Save Seed:

1. Choose your best plants.

Look for healthy, true-to-type beets with good colour, shape, and no signs of disease. You’ll need at least 6 – 20 plants to ensure good genetic diversity.

2. Overwinter your plants.

• In warmer areas: Leave them in the ground.
• In cold zones: Dig up roots, cut back leaves to 5 cm, and store in sand or sawdust in a cool, dry spot. Replant in early spring.

3. Let them bolt.

In spring, beets will send up tall, branching flower stalks with small green flowers.

4. Pollination & Isolation

Beetroot is wind-pollinated and will cross with:

• Other beetroot varieties
• Silverbeet
• Sugar beet
• Swiss chard

To save pure beetroot seed, isolate different varieties by at least 1 – 2 km, or bag seed heads and hand-pollinate if growing more than one Beta vulgaris type.

5. Harvesting Seed

• Wait for the flower stalks to dry and turn brown.
• Shake or rub dry seed heads to release seeds (they’ll look like small knobbly clusters).
• Clean off chaff and store in a cool, dry, dark place.
• Label well! Seeds can remain viable for 4–5 years if stored correctly.

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💡 Extra Tips & Troubleshooting

Common Pests & Problems:

• Leaf miners: Pick off affected leaves, encourage beneficial insects
• Aphids: Hose off or spray with neem oil
• Boron deficiency (causes black spots in roots): Treat with seaweed-based liquid fertiliser

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