Raspberry nutrient deficiency

Time to act:

Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov

For plants to successfully grow, flower and fruit they need nitrogen, potassium, phosphorous and different trace elements. Without one or more of these, plants will start to display physiological symptoms – low nitrogen causes weak, yellow leaves, while a potassium deficiency results in poor harvests and discoloured foliage. Trace elements include manganese and iron, and it's deficiencies of these that are most frequently encountered, resulting in yellow leaves and brown edges.

Symptoms

In summer, raspberries fail to thrive, the crop is poor and the leaves have a general unhealthy look.

Find it on

raspberries

Advertisement

Organic

Pelleted poultry manure gives a quick boost of nitrogen, while organic compost gives a longer-term solution. Add bonemeal if your raspberries are short of phosphorous. In general, if you've added plenty of well-rotted compost to the soil to improve moisture retention, drainage and soil structure, you're unlikely to have too many problems.

Chemical

Add sulphate of ammonia for nitrogen deficiency. Sulphate of potash cures potassium deficiency. For low phosphorous levels, apply super-phosphates. Top up manganese levels with iron chelate and use Epsom salts to tackle magnesium deficiency.

Advertisement

Discover more ideas and inspiration

Related content

How to plant bare-root raspberries

Grey mould on soft fruits

How to force rhubarb

How to plant long-cane raspberries

Related offers

Offer

10 free strawberry plants

Order from a selection of great fruit and veg varieties and receive 10 free strawberry 'Flamenco' runners, worth £11.95 (add the strawberry runners to your basket and apply offer code for price to be deducted).

Use code: GD16OCT

Order now

Offer

Free apple tree

Order any fruit tree to plant this autumn from this special selection at Thomspon & Morgan, and receive a free apple 'Golden Delicious' tree worth £14.99.

Order now

Offer

Save 15% on apple trees

Save 15% on a fantastic range of apple tree varieties to plant this autumn, including Cox's, Russet, Brambley, Braeburn and more.

Use code: GW10AP

Order now