Roses in the ground
For the rosebushes planted on the ground, from the second year from the plant, two main fertilizations can be carried out, one in the autumn and one concentrated in the pre or post flowering phase.
In the autumn, the mature manure is the best organic fertilizer. You can also use pellets or other organic fertilizers, to distribute and bury in the first centimeters of soil at the base of the roses.
The second fertilization can be done with a complex, slow-release chemical fertilizer (the ones used for the garden are also fine), when the plant is in the budding phase, at the beginning of spring or waiting for the flowers to end.
It is not obligatory to fertilize the plants more than once, but depending to the type of soil, exposure and type of roses, everyone will learn what will be more appropriate to choose, also based on the plants growth during the previous season. (It is however always useful not to exceed, roses do not die of hunger, but sometimes for too much care!)
The best fertilizer for the soil and for the plant is the organic one in autumn. The low temperatures ensure a slow and complete degradation of the organic substance in favor of the fertility of the soil, helping the formation of humus. With temperatures increasing and the arrival time of warmer seasons, inverse biochemical processes take place, rapidly developing mineral compounds starting from the stored humus.
For potted roses, it is recommended to use containers at least 40 cm wide and more than 50 high, universal soil and being sure it stays moist, especially in periods of high heat. In summer, depending to the various cases, a daily abundant wetting may also be necessary. Avoid the flower dish.
You can choose to distribute liquid fertilizer for flowering plants in the doses indicated in the packages, or slow release granular fertilizers. In any case, an autumn organic fertilization is recommended. Avoid fertilizing during periods of strong heat.
The potted roses should be replanted, cleaned and renewed the soil more or less every 4 years, or as soon as the plant shows suffering and effort to grow and flourish.