How should quick-release fertilizer and slow-release fertilizer be used when fertilizing roses?

Quick-release fertilizers contain a large amount of salt, and too much salt can actually cause some harm to the plant, so when using it, more is not better. Some flower lovers may be overeager to see blooms, thinking that if I give the rose a lot of fertilizer at once, it will produce lots of flowers.

Trust me, doing this is undoubtedly like pulling up seedlings to help them grow - you will not only fail to see a mass of blooms, but a wave of flower buds that had already emerged may all wilt because you applied a large dose of quick-release fertilizer once, and by then it will be too late to cry.

No matter how fast-acting or effective a fertilizer is, you must stick to the principle of using an appropriate amount, within what the plant itself can tolerate. For example, although a large batch of flowers is blooming now, at the same time another batch of flower buds is emerging. At this point, not only do the blooming flowers need nutrients, but you also need to give that batch of emerging buds enough support to bloom.

In this situation, you can fertilize a bit more frequently, but the amount each time still must not be excessive. In fact, even if you give too much, the root system's absorption capacity is limited; exceeding it both wastes fertilizer and harms the roots. Also, do not water with fertilizer several times in a row - at most twice is enough, then water with plain water to let the moisture leach out the fertilizer residue.

Slow-release fertilizers last for different lengths of time, ranging from three months to nine months. You can choose according to the size of the pot and the plant. Generally speaking, the shorter the duration of the slow-release fertilizer, the faster it takes effect, and the longer the duration, the slower it takes effect. In other words, the fertilizing effect you can see from a three-month slow-release fertilizer is more obvious than from a nine-month one.

So when choosing, you can pick according to the actual situation, but note that when fertilizing, it is better to give less and apply it more frequently several times than to give an excessive amount all at once. Especially for small seedlings, it is actually not very advisable to place slow-release fertilizer at the bottom of the flower pot, because when the temperature rises and the root system is still tender, it is very easy to overdose nutrients and burn the roots.