Quand donner de l'engrais aux plantes d'intérieur ?
Christelle Munoz
2025-08-05 14:21:41
Nombre de réponses
: 8
Vous pouvez start fertilizing your houseplants about 8 weeks before the last spring frost.
Fertilize your houseplants in the spring
As in the vegetable garden, the ice saints (which take place around May 11, May 12 and May 13) are an ancestral landmark that has proven its worth.
This means starting to apply fertilizer in mid-March.
At this time, the days begin to lengthen noticeably, and houseplants go from a semi-dormant state to a period of active growth.
If you use a liquid fertilizer, apply half the recommended dose, once a month until summer.
Fertilize indoor plants in summer
The frequency of summer fertilizer applications depends on the type of fertilizer you use.
Natural liquid fertilizers are applied more frequently, every two weeks, or weekly for fast-growing plants.
Granulated products are to be used less frequently, about once every month or every two months.
Slow-release houseplant fertilizers break down slowly and release their nutrients in small amounts, over a long period of time.
A single application of most of these products lasts three to four months.
Fertilize indoor plants in the fall
About 8 weeks before the first expected fall frost, reduce the amounts and frequency of your fertilizers.
This means that from mid-August you can halve the amount of fertilizer and extend the interval between two fertilizations.
Fertilize indoor plants in winter
Most houseplants are not in a state of active growth during the winter and therefore should not be fertilized.
There are a few exceptions to this rule.
Some plants, such as orchids for example, can stay in bloom all winter long if they have enough nutrients and light.
In this case, an application of a half dose of liquid fertilizer in the middle of winter can be envisaged.
The case of repotting: If you have just repotted your plant with good quality soil, you can refrain from applying fertilizer during the first 1 or 2 months.
Outside temperate climate: This calendar works assuming you live in a temperate climate.
In a climate that doesn't experience regular winter frosts, continue to fertilize your houseplants throughout the winter, but do so at half the amount and frequency of your summer applications.
And if you live in a tropical climate, where it's always hot, keep fertilizing your houseplants in the summer all year round.
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