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 prune summer-fruiting raspberries

How to plant bare-root raspberries

Grey mould on soft fruits

How to plant long-cane raspberries

Related offers

Offer

20 free* strawberry plants

Claim your collection of 20 strawberry bare-root plants (worth over £21) for free - *just pay £5.95 for postage. Please add the strawberry collection to your basket and enter our offer code to claim your discount.

Use code: GWD17STRAW

Order now

Offer

Save £17 on blackcurrants

Enjoy the delicious taste of fresh, home-grown blackcurrants for less. You can buy one blackcurrant 'Ben Connan' for £9.99, or save £17.98 when you buy three for just £11.99.

Order now

SAVE 20%

Subscriber only content

Save at Blooming Direct

Save 20 per cent on everything at Blooming Direct, including roses, shrubs, grow-your-own fruit and veg, bedding, bulbs, a range of accessories and more.

Unlock now