Fruit Agronomy Advice

Blueberry nutrition and fertigation is very much a consequence of the rooting system and pH range. Blueberries are more acid-loving than most soft fruits and also have a less efficient root system which has consequences for fertigation recommendations.

Blueberry roots remember are fine and fibrous, meaning uptake is slower, compared to more vigorous rooting systems like strawberry and raspberry. The blueberry plant can take up as much N as other plants as they have a much larger root mass overall. Blueberry struggles to take on immoveable nutrients like Calcium, due to the pH range.

Ammonium nitrate is the preferred nitrogen source

The blueberry plant is more acid-loving than most of the soft fruits, enjoying pH as low as 4.5 to 5.5. Ammonium nitrate is the preferred nitrogen source since this lowers the soil pH through nitrification, to the benefit of the blueberry. The blueberry plant prefers ammonium as it binds to the soil and does not leach through as nitrate would. Calcium nitrate is not recommended for blueberries, Calcium is detrimental as it raises the pH range and causes problems with the brittleness of the peduncle. This leads to blueberries dropping fruits early if disturbed, where normally a less brittle peduncle, can retain the berry in high winds or other disturbing situations.

For young and small plants the focus should be to push vegetative growth forwards with a balance of ammonium and nitrate N complimented with P&K plus micronutrients to nurture the plants and develop robust root systems. Typically YaraTera Kristalon Lilac (20-8-8 + micronutrients ) would be recommended for young plants often using a single tank system. Newer plants may stay on the single tank system for 3-4 years before moving to the two-tank system, although some newer specialist varieties may make the switch in 1-2 years.

For more mature plants the focus is on a heavier feed programme to support fruit production and flowering habit. This requires a more balanced nutrition so typically a two-tank system with YaraTera Amnitra L (18-0-0) in Tank A and YaraTera Kristalon Brown (3-11-38 + micronutrients ) or YaraTera Kristalon Scarlet (7.5-12-36+ micronutrients ) for medium flower situations.

Check out our blueberry fertigation programme

Recommended products

YaraTera KRISTALON LILAC LB

20-8-8 + 2% MgO 25% SO3 - A water soluble NPK fertiliser for liquid feeding and contains a full range of chelated micronutrients ideal for all fertigation systems.

YaraTera KRISTALON BROWN

3-11-38 + 4% MgO 27.5% SO3 - A water soluble NPK fertiliser for liquid feeding and contains a full range of chelated micronutrients ideal for all fertigation systems.

YaraTera AMNITRA L

A quality liquid nitrogen fertiliser suitable for application through all fertigation systems.

All YaraTera fertigation fertilisers

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Is there a better alternative to monopotassium phosphate

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Late season advice for soft fruit crops

As the soft fruit production season nears an end with final harvests underway it is important to keep a focus on nutrition to avoid carrying any issues over to next season so here are a few recomendations for strawberry and raspberry growers to ensure crops go in to dormancy in good condition.

Fruit crops benefit from foliar calcium in a wet season

After a wet winter many fruit plants may have been growing under saturated conditions for some time. Under these circumstances the application of foliar fed calcium will be advantageous.

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How to manage blueberry fertigation

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