Fruit Trees
Showing posts with label factsheet. Show all posts
Showing posts with label factsheet. Show all posts

PlantNet: Secrets to Successful Fruit Growing


Site selection - Select a sunny, well drained position. For poor draining soils trees should be
planted on mounds or hills.

Pre plant - 3 months before planting, prepare soil by adding mulch and pelletised poultry,
or cow manure to the site. For pots a good premium potting mixed with about 10-20% of a
good loam soil will give the mix extra body and assist with holding water and nutrients. The
use of water crystals or a good soil wetter will assist in retention of moisture also.
Ensure the soil pH is between 6.0 and 6.5 for best results

Planting - Dig a hole twice the size of the nursery pot, do not tease the root system of
potted plants. If planting in a large pot we suggest 50 cm diameter minimum size. Do not put
fertiliser in the hole. A closed handful of blood and bone fertiliser mixed into the bottom of
the hole is fine.

If planting winter bare root trees look at the dirt mark on the base of the nursery tree and
plant this at the soil or potting mix level. For potted trees purchased in summer, plant the soil
level in the nursery pot level with your soil or potting mix and add a sprinkle of soil to cover
the roots in the nursery pot.

Fertilising young non bearing trees- The focus for the first 12-18 months is on building a
strong framework capable of bearing heavy crops. A good complete fertiliser or
composted manure is ideal. Give the tree a closed handful of fertiliser every 3 – 4 weeks
applied in a wide band from the drip line to within 30cm of the base of the tree. For pots use
half a closed handful. Do not apply fertiliser against the base of the tree as this may cause
tree death. An addition of a good trace element fertiliser twice a year is also important.

Fertilising bearing trees - From spring in year two from planting the focus now shifts back to
fruit production. Avoid fertilising during flowering and early fruit set with fertilisers high in
Nitrogen (N).( up to 15% is ideal). A good balanced fertiliser with high potassium (K) above
12% is ideal. Give the tree a closed handful of fertiliser every 3 – 4 weeks applied in a wide
band from the drip line to within 30cm of the base of the tree. For pots use half a closed
handful.

Watering - Fruit trees peak water demand is from when the first full leaf forms after trees
break dormancy. Not enough water at this time will cause poor fruit set and fruit
development. Continue to apply water in hot periods after harvest. Water needs will decrease
from April on and trees may only need a third of what is required during the growing season.
Be aware potted trees may need water more often than in ground trees sometimes every day
in hot dry periods.

Leaf removal - If leaf fall is not completed by mid June, strip leaves from trees. This is so the
tree achieves strong, even bud break in Spring, leading to larger fruit.

Pruning – Dwarf fruit trees require minimal pruning and only shaping of the tree is necessary
in winter time. For more specific information go to the pruning page on the PlantNet website.

Fruit thinning - For strong young trees up to 2 years old leave one fruit per lateral or twig.
For trees 3 years and older leave 1 fruit on small laterals and 2-3 fruit on thicker laterals. Aim
for 40-60 fruit per tree for strong healthy trees in year 3 and increase fruit numbers each year.
Pests and disease control information can be found on the www.plantnet/plant care page on
our website

Scan hereto go to the plantnet plant care page. 


Growing Fruit Trees - General Guide

This guide is general in nature but this applies to most of the fruit trees we sell. In order to grow fruit successfully you tree will require the following

  • A full sun position
  • Free draining soil - if you have heavy soil, mound your planting site with compost and good quality garden soil before planting, you can work Gypsum into the hole to break up clay.
  • 6-7 ideal pH for most plants
  • Regular applications of a balanced NPK fertilizer during the growing season as directed, foliar sprays of liquid fertilizer will also be beneficial during the warmer months. Choose an organic fertilizer if you can.
  • Regular and even moisture will result in the best fruit.
  • Maintain a weed free area around your tree
  • Liberally apply compost around your fruit trees and mulch them well with an organic mulch, this can be your own lawn clippings. This will help to retain moisture and reduce weed competition, be sure to keep away from the trunk of your tree.
  • Potted fruit trees will require a pot at least 25- 35 litres in size and always use good quality potting mix in pots, feed and water regularly. Wetting agent can be very helpful to ensure the mix is penetrated.
  • Remove all the flowers from young trees for the first two years so your tree has a chance to establish into a strong and healthy plant before you leave the fruit to mature
  • Maintain all grafted plants by removing any suckers from below the graft as they appear.

Climate Zones

Australia has a wide range of climates from the wet tropics to cool temperate climates and it is important to consider your climate when selecting trees that will be best suited to your area so they will thrive and be productive once planted. This map from the Organic Gardener Magazine is an excellent example of a climate map that will help you to understand what type of climate you live in.
Growing plants that are well suited to your climate will ensure you have success, while trying to grow unsuitable plants may result in you becoming discouraged when they do not thrive and they may also be more susceptible to stresses that increases the risk of pests and diseases problems. This is not to discourage the passionate gardeners out there who are always very keen to try growing plants well out of their natural climates and who have some wonderful success stories to tell.

If you are new to gardening it is a good idea to start with something that is ideally suited to your climate so that it will flourish and your success with one thing will inspire you to grow more and garden more. Understanding your climate is just the beginning as every garden will also have its own microclimate. Consider the aspect of your land, does it face north, south, east or west and where the sun is at it hottest. Where are your shady, cool damp spots and do you have a cold frost gully where the cool air pools on cold winter nights. Do you have a sheltered sun trap, do you have bare north facing walls that can be used to reflect the heat back onto heat loving plants during the winter. Understanding the lay of the land will be essential in helping you select the ideal positions for you favourite trees.

Chill Hours for Fruit Trees - Calculation using BOM Australia

Many of our Bare Root Fruit Trees that we sell in June and July will not give you fruit unless you get the right Chill Hours in Winter.

For Example the Angel Peach Tree has two different varieties. A High Chill and a Low Chill Variety. If you live in Cairns and buy the High Chill Angel Peach you will not get any fruit.

Definition of Chill Hours for Fruit Trees
Time spent below approximately 7 degrees.

High Chill Fruit Trees are 650+ Hours
Medium Chill Fruit Trees are 450-650 Hours
Low Chill Fruit Trees are 150-450 Hours

Silly Question: Do I go outside every day of the year with a stopwatch and a thermometer?

Answer: You could, but it is obviously a very funny waste of time

Calculating Chill Hours at your Address in Australia
Just to make it clear straight up plants are alive and as such there is no exact science for the amount of chill hours a certain fruit tree needs, it is always going to be approximate.

In Australia we are privileged to get the website for the Bureau of Meteorology and this allows us to find the Average temperature of the coldest month. We then use this temperature to Estimate the chill hours.

Step 1
Go to the the BOMS Climate Data Online

Step 2
Data about: Temperature
Type of Data: Monthly
Select: Mean Minimum Temperature
Weather Station: [Type your own Suburb here]
Nearest Bureau: Closest to your address
Click: Get Data
Step 3: This will give you a view of the Monthly Mean Minimum Temperature for your suburb.

Step 4: Scroll down the page to the last year of information and select the Lowest Monthly Mean Temperature which is usually in July but sometimes June.

Step 6: While you are looking at this number take note of the previous year minimums. Perhaps this year was an exception and you might like to use another years minimum. So in this case I am using 7.2 degrees.

Step 7: Now we want to find the Mean Maximum Temperature that matches this figure from Step 6  So I need to remember 2011 and the month of July. ( yours might be June )

Go back to the BOMS Climate Data Online ( Likely already opened ) But this time select:
Data about: Temperature
Type of Data: Monthly
Select: Mean Maximum Temperature
Weather Station: [Type your own Suburb here]
Nearest Bureau: Closest to your address
Click: Get Data

Step 8: Scroll Down to the latest year and select the temperature for the corresponding month to step 6.

In my example it is 21.1 degrees.

Step 9: Now we want to add the Mean Minimum Temperature and the Mean Maximum Temperature together and divide by 2 to get the average. In this case (7.2+21.1)/2=14.15

Step 10
Now we try and fit this number into the Chill Hours Table below. The Chill hours in this table are commonly used to describe Fruit Tree Chill Hours and you will see them across the Daleys Fruit Tree Website in descriptions, across the web and fruit tree reference books.

Chill Hours           Average Temperature for coldest month
0                               19.7 degrees (No Chill)
300                           15.5 degrees (Low Chill)
330                           15.3 degrees (Low Chill)
450                           14 degrees (Medium Chill)
500                           13.6 degrees (Medium Chill)
520                           13.1 degrees (Medium Chill)
600                           12.7 degrees (Medium to High Chill)
800                           10.2 degrees (High Chill)
1100                         7.9 degrees (High Chill)
1250                         0 degrees (Very High Chill)

So for the case used which was 14.15 degrees we can approximate this to 330-450 Chill Hours or Low Chill. If a plant that requires Medium Chill was purchased it might produce fruit some years when the winter is colder but not others when the winter is warmer.

Things to Consider
Remember how we said you could take a stopwatch and a thermometer outside? Well here is your chance. The weather station that you chose in step 2 is very unlikely to be exactly the same as your backyard orchard. So what you can do is every morning just before sunrise record your backyard orchards temperature. Then go to the BOMs Climate Data Online and fill out the form for Daily Data by selecting:

Data about: Temperature
Type of Data: Daily
Select: Minimum Temperature
Weather Station: [Type your own Suburb here]
Nearest Bureau: Closest to your address
Click: Get Data

Now if the reading you got from the thermometer in you backyard orchard is lower then the BOMs minimum temperature you can assume that you will get slightly more chill hours then the calculation you got by using the above steps. This means that you "might" be able to get fruit with a higher chill variety.

Conclusion and Final Note
If you are reading this it is likely that you are a fruit lover who wants to test the boundaries of what is possible. At Daleys we have come to accept that people in Victoria (Australia's High Chill Country) want to grow Tropical Fruit Trees and people in Rochampton (Australia's Low Chill Country) want to grow high chill temperate fruit trees even though we don't like your chances of getting fruit. However some of you have many examples where you have succeeded. The Daleys Fruit Tree Forum has many of these stories.

If you are in a Low Chill environment and want to grow fruits such as Blueberries, Apples, Plums and even Cherries then we often have varieties that are Low Chill. For example the Acerola Cherry Tree crops in Low Chill Climates.

Growing High Chill Fruit Trees in a Low Chill Climate
Now if you know that you don't get the right chill hours and are still super keen to grow high chill plants my only other suggestion is to grow your plants in pots and get yourself a super big freezer to put them in during winter. JOKING!!!!!!!!!!