Material you add to a garden to increase the nutrients in the soil and help plants grow is called fertilizer. If your rosebushes are looking a little sad, you might want to try using fertilizer.

To fertilize is to make something fertile, or to encourage it to grow or reproduce. These words, along with fertilizer, come from the Latin fertilis, "bearing in abundance, fruitful, or productive." The most common kind of organic fertilizer is animal manure or peat, and other fertilizers are made of specific nutrients like nitrogen or potassium. Fertilizers are usually solid, though they come in liquid form as well.

Definitions of fertilizer
  1. noun
    any substance such as manure or a mixture of nitrates used to make soil more fertile
    synonyms: fertiliser, plant food
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    organic, organic fertiliser, organic fertilizer
    a fertilizer that is derived from animal or vegetable matter
    fertilizer made of ground bones
    neem cake
    residue after oil is pressed from neem seeds
    any animal or plant material used to fertilize land especially animal excreta usually with litter material
    fish meal
    ground dried fish used as fertilizer and as feed for domestic livestock
    the excrement of sea birds; used as fertilizer
    type of:
    chemical, chemical substance
    material produced by or used in a reaction involving changes in atoms or molecules
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