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Leeks Quiz
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Winter leeks – how are they different to summer varieties? Choose two answers.
1 point
They have a longer shank
They grow more slowly than summer leeks
They tolerate waterlogged soil
Their leaves are usually a deeper green
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How can you have a range of harvesting dates from just one sowing?
1 point
Sow late and early varieties, at the same time
Transplant at different depths
Use different potting composts
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Why do I advise sowing in mid-spring, and not earlier?
1 point
Earlier sowing increases the risk of bolting in summer
Slugs damage is worse to early sowings
Germination is poor from sowing in early spring
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Unlike garlic, the flower stem that leeks produce when they go to seed is not edible.
1 point
True
False
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What are two advantages of multisowing in modules, compared to raising transplants in the garden?
1 point
Germination is more even and uniform
Less space is needed
Leek stems grow longer in modules
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What spacing do I recommend for planting out clumps?
1 point
20–25 cm/8–10 in
15–20cm/6–8 in
25–30cm/10–12 in
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What do you need to be aware of when transplanting leeks after potatoes?
1 point
If the potatoes had blight, it’s a sign of poor soil
The potatoes may have sucked the soil dry
The need for 5 cm/2 in of extra compost
The soil is likely to be deficient in nutrients
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What practice have I found which reduces leek rust?
1 point
Monthly weeding
Watering soil only, never the leaves
Removing older, yellowing/rusty leaves every week or two
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Why do I suggest going through your (leek) crop in autumn and taking out any very small leeks? Choose two answers.
1 point
To reduce leek moth
Because they won’t grow large
Removing them makes it easier to keep remaining plants clear of rust
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What helps leeks to store for longer in winter?
1 point
Keep them in paper sacks
Leave the roots attached, with soil on
Harvest them before any autumn frost
Store them in the dark
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Why does cross-pollination of leek flowers for seed result in healthier growth from that seed?
1 point
More genetic diversity
It helps soil health
Stronger in-breeding
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Which pest can cause damage to leeks at two stages during the year?
1 point
Pigeons
Leek moth
Moles
Allium leaf miner
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For which two potential problems do I suggest rotation?
1 point
Leek moth
Leek rust
White rot
Allium leaf miner
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Why do I encourage leaving allium roots in the ground when you harvest?
1 point
To reduce white rot in the soil
To save time
Because when the roots decompose they leave channels for air and are food for microbes
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