Autumn workshop · article 4

The last feed: when to stop nitrogen

At the end of the season a rose does not need to push out tender shoots that will not have time to ripen.

Short answerNitrogen feeds should be finished well before the cold, for most gardens in the second half of summer. The exact timing depends on the region, the weather and the rate of growth. Phosphorus and potassium are not applied automatically; they go on only as the soil needs them and as the product's instructions say.

How to decide

  1. Look at the growth. If the bush is pushing soft, reddish shoots, a fresh nitrogen boost is not appropriate.
  2. Think back to earlier applications. Fertile, mulched soil and a vigorous rose may need no extra feeding at all.
  3. Check the composition. A label that says 'autumn' does not replace reading the label itself: the nutrient analysis and the dose.
  4. Do not treat stress with fertiliser. Yellowing caused by water, roots or disease does not go away with new granules.
No magic formula

Potassium will not correct a late excess of nitrogen, a wet site or an unsuitable variety. Excess fertiliser can damage the roots.

Verified sources

My climate

Choose a reference temperature to compare with the cultivar’s data. This is not an overwintering forecast or advice on winter protection; consider wind, moisture and the duration of frost.

Regional data are generalised. USDA describes average annual extreme minima, not a forecast; the values in the list are rounded. Check the conditions at your site. More information: Roses in Ukraine's climate.