Feeding raspberries in autumn: tips for a good harvest
· Valerii Korolko · 3 min read
Why autumn feeding of raspberries is necessary
After the harvest the plant is exhausted. If it is not fed, it will be weakened over winter, and next year's harvest will be modest.
That is why autumn feeding of raspberries is not a whim but an essential stage of care. It helps the roots to build up strength, the shoots to ripen and the bushes to survive frosts more easily.
When and how to feed raspberries in autumn
Optimal timing for applying fertilisers
The best time for feeding is immediately after the harvest, in August–September. During this period the bushes are still actively growing, and the fertilisers have time to be absorbed. Later, when the nights turn cold and the soil cools down, feeding becomes ineffective.
The effect of weather conditions on the choice of feeding time
Do not apply fertilisers in hot weather or during heavy rain. The ideal option is a dry but not hot day, when the soil temperature stays within +10…+15 °C. In that case the nutrients will be absorbed best.
What to feed raspberries with in autumn
Mineral fertilisers with potassium and phosphorus
The main principle: no nitrogen in autumn! It stimulates the growth of green mass, which will not have time to ripen and will freeze. Raspberries need potassium and phosphorus instead:
- Superphosphate – strengthens the root system.
- Potassium sulphate – increases frost resistance and resistance to disease.
- Monopotassium phosphate – a universal option for watering and spraying.
Such autumn feeding of raspberries makes it possible to lay the foundations of the future harvest.
Organic feeds
Well-rotted manure or compost is an excellent feed. They not only enrich plants with nutrients but also improve the soil structure, making it loose and rich in microorganisms. Fresh manure must not be applied – it burns the roots and promotes the development of diseases.
Ready-made autumn complex mixes
Many manufacturers of mineral fertilisers want to make life easier for their customers, so for beginners they produce ready-made mixes marked “autumn”. They already contain potassium and phosphorus, and nitrogen is absent. This is a convenient and safe option, especially for beginners.
What to do with raspberries in autumn after harvesting
Pruning old shoots
After the berries are picked, many old shoots that have finished fruiting remain on the bushes. They are no longer needed and even do harm, taking away strength. They should therefore be cut right down to the ground. This is one of the key stages when we decide what to do with raspberries in autumn.
Mulching and loosening the soil
It is recommended to loosen the soil around raspberries to give the roots access to air. It is then advisable to mulch it with a layer of humus, compost or even dry leaves. This will protect the roots from frost and retain moisture.
Autumn treatment against pests and diseases
Another important point is preventive treatment. After the harvest, fungal spores and pest larvae may remain on the bushes. Treatment with fungicides is therefore reliable protection before winter.
How to apply feed correctly
Root feeding
The most common method is root feeding. Dissolve the fertiliser in water and pour it under the root (be sure to do this on moist soil to avoid burns). Such autumn feeding of raspberries acts for longer and more deeply.
Foliar spraying
Sometimes it is useful to carry out light foliar spraying with a solution of monopotassium phosphate. This helps to quickly “boost” the bush before wintering. But it should be done only in early autumn, while the leaves are still green.
Conclusions and important tips
- Autumn feeding of raspberries is the key to a good harvest next year.
- In autumn use phosphorus-potassium fertilisers and avoid nitrogen (until spring).
- Organic feeds and mulch are an excellent complement to mineral mixes.
- Do not forget about pruning, loosening the soil and treatment against pests.
- It is better to give one good-quality feed on time than several late ones, which will be ineffective.
Proper care after picking the berries is the answer to the question of what to do with raspberries in autumn. If you give the bushes a little attention, next summer they will repay you with a generous harvest, larger berries and strong, healthy shoots.
If you need quality Belgian Prayon fertiliser to improve your harvest, contact our managers in any way convenient for you
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