How to grow garlic in New Zealand

When to grow garlic in New Zealand

• Plant – April to July (traditionally on the shortest day of the year)
• Harvest – November to February (traditionally on the longest day of the year)

Begin by splitting the bulb carefully into individual clove segments, and then gently push each clove into the soil so the tip is just below the soil surface, with the pointed end of the clove upwards and the flatter basal plate facing down. Allow a gap of 15cm between each clove and 20-30cm between rows.

Planting in the garden

Garlic does best in a fertile, well-drained soil in position that receives full sun for most of the day. The bulbs need a period of cold weather in order to initiate growth, so the best time to plant Garlic is in Autumn.

Step 1

Before planting garlic, prepare the soil by digging in Scotts Osmocote® Compost & Soil Improver and removing any weeds.

Step 2

Apply Scotts Sheep Pellets and dig into the soil Osmocote® Controlled Release Fertiliser: Tomato, Vegetable & Herb and rake into the soil.

Step 3

Break the garlic bulbs into individual cloves and plant cloves 15cm apart and with the tip just below the surface and pointing upwards. Space rows 30cm apart.

Step 4

Water after planting, to help settle the soil around the cloves.

Tip

Protect your garlic from the elements with Scotts Pea Straw Mulch, keeping it moist and cool as it grows.

How to grow garlic in pots

Garlic will grow happily in containers outdoors, and this is a good option in gardens where the soil is very heavy and wet or where space is limited.

Step 1

Choose a container at least 30cm in diameter and 20cm deep, with good drainage holes.

Step 2

Fill with Scotts Osmocote Vegetable Mix. 

Step 3

Plant the cloves 10-15cm apart and 2.5cm deep, with tips just below the surface and pointing upwards. Don't plant bulbs right up against the edge of the container - leave enough space for them to swell as they grow.

Step 4

Water regularly to keep the potting mix moist.

Tips

Feed with Osmocote® Controlled Release Fertiliser: Tomato, Vegetable & Herb in Spring

Caring for garlic

Once planted, garlic doesn't need much looking after. Just follow these simple steps for a good crop:

1. Keep beds weed-free. Remove weeds by hand to avoid damaging the bulbs with a hoe.
2. Water during long dry periods.
3. About a month before harvest reduce watering.
4. If flowers appear (called scapes) remove these so the plants energies go into the developing bulb. Use the scapes in stir fries.

Harvesting garlic

• While Garlic is growing, you can harvest a leaf now and then to add to salads, but don't take too many at a time from any one plant.
• The Garlic bulbs themselves should be ready to harvest from early summer. To know when to harvest garlic in New Zealand, look at the plants' leaves - when they turn yellow, the garlic is ready to be harvested.
• Use a garden fork to gently lift the bulbs from the soil.
• Simply upend pots to harvest Garlic grown in containers.

How to store garlic

• Before storing garlic, lay the bulbs outside in the sun on a rack, or inside in a well-ventilated shed, to allow them to dry out. This will take two to three weeks.
• Once the skins are dry and papery, the bulbs are ready to be stored. Remove any damaged or bruised bulbs.
• Store garlic bulbs in a string bag or plait the leaves and hang them in a cool, dry, dark place.

Common garlic pests & diseases

Although garlic is easy to grow, there are a few diseases that can cause problems.

White Rot

White rot is a fungal disease that rots garlic bulbs and causes leaves to turn yellow and die. Unfortunately, there's no treatment available for this. Burn all affected plants and don't plant garlic or other allium bulbs in that soil for at least eight years.

Leek Rust

Leek rust, another fungal disease, causes orange blotches on leaves. Mild cases will not necessarily affect the crop but remove any infected leaves as soon as you see them and burn or dispose of them (but not into the compost). Leek rust is more common in long periods of wet weather and on overcrowded plants. Avoid planting garlic or other alliums in affected soil for at least three years.