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Growing Strawberries in Queensland

Introducing Strawberries

A classic, all-time favourite fruit which is easy to grow in even the smallest of home gardens or urban spaces. Growing them yourself is incredibly rewarding, and home grown strawberries are guaranteed to have far more flavour than the mass produced berries on shelves in supermarkets. They will grow happily in a variety of containers, runners and planters, horizontally, vertically, or even upside down from hanging baskets. There are over 45 varieties, and a bunch of them thrive in the hot and humid Queensland climate.

Classic Mistakes

Strawberry plants are prone to getting viral and fungal diseases, so allowing your strawberries to become over crowded, or for beds to be filled with dead leaves and weeds will make the plants more susceptible to these diseases.

Sunlight

Grow in: Partial Shade - Full Sun

Strawberries are actually a cool climate crop, so you may need to set up some shade cloth to protect your plants from the intense summer sun.

Soil Preparation

Strawberries prefer acid soils, but will grow in a variety of conditions. Whether planting in a bed, container or runner, dig in compost and manure, followed by rock dust and potash. Avoid nitrogen rich fertilisers, as well planting your strawberries in soil which has previously been used to grow beans, peas and any other legumes or berries. For planting, dig out a bed, put down some chicken manure, with several handfuls of blood and bone, then compost and finish with the original soil in a mound about 15cm high.

Sowing Seed

Sow seed: March-May
Sowing depth: Twice the height of the seed.

If you live in the hotter, more humid regions of Queensland, be sure to sow your seeds as early as March to give your seedlings a chance to become established. In the cooler, more temperate regions of Queensland you can sow seeds from June to August

Provide your strawberry seeds with an artificial cold winter by chilling your strawberry seeds in the freezer for 2-4 weeks.

Growing strawberries from seed is not for the impatient gardener, as most plants grown from seed will only bear fruit a year after planting (or 5 months in the case of Alpine strawberries). This is why it is best to grow your strawberries from crowns.

Planting

Plant seedlings: April-May

Plant early in the season to give your plants a chance to become established

Plant crowns at ground level, but make sure that the roots are completely covered.

Propagation

Propagating strawberry plants is not very difficult, and can be incredibly rewarding. You can use on of 3 methods:

1. Grow new plants from seeds.

2. Once more crowns begin to grow from the base of the plant, separate these and transplant them, but be careful not to damage either part in the process.

3. Propagate from runner. This is the safest and easiest method of propagating strawberry plants. Simply guide one of the runners shooting out from the plant into a neighbouring pot or container with nutritious soil and wait for it to establish a strong root system. The runner will eventually dry up and break off, and you will be free to move the pot to its new home.

Care

Remove the runners, weeds and dead leaves to avoid diseases as well as to stimulate growth and an increase in fruit production. Take the plants out of the ground every year, replant in a new bed, and use runners to generate new plants.

Watering

Drip irrigating works wonderfully for strawberries. Keep the soil moist by watering regularly, but avoid over watering, as this can cause the fruit to rot as well as inviting other rot and snails. When the bulk of the harvest is nearly ripe, avoid heavy soaking to increase the flavour. Watering too much during this phase might mean bigger fruit, but a decrease in flavour.

Feeding

Fertilise in autumn with compost and worm castings if available. Apply liquid seaweed fortnightly to protects the leaves some pests and sweetens fruits. Feed with liquid potash when flowers appear, to sweeten fruit.

Mulching

Plastic mulch, with holes perforated for the plants is an option. This will help to control weeds and keeps the plants warm, but it can also impact soil health negatively, and does not biodegrade. The natural alternative is clean straw mulch, which can be added close around the plants. Pine needle mulch around the plants is also beneficial, as it increases soil acidity.

Harvesting

Harvest: September-December

Different varieties will be ready to harvest at different times. Most strawberries ripen in spring, but some varieties may produce fruit all the way into autumn. You can expect to pick the first fruit 20-35 days after the flowers appear. Wait until the fruit is shiny and deep red and then pick them by cutting the stem. Once picked, they will keep in the refrigerator for 3 -5 days.

What to do about Possums?

Net plants as soon as fruit starts forming.

What to do about Aphids?

Viral infestations can be caused by aphids. Use soap sprays, or manually remove the aphids.

What to do about Birds?

Net plants as soon as fruit starts forming.

What to do about Snails and slugs?

Lay down grit, like eggshells or silica sand or create barriers around your plants. Remove any slugs or snails that you see.

What to do about Fungus?

Fungal infections are many and varied, remove damaged leaves and weeds, and spray with copper spray in autumn. You will need to replace plants every two to three years and rotate planting sites to keep plants healthy.
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