Tomatoes were and will always be one of our most valuable assets on the garden, and sometime we invest so much in it that we forgot about the other plants, and then we just say can I benefit my plants with the surplus that I have from tomato fertilizer, after all plants are somehow all similar and have common requirements, so the question is Can you use tomato fertilizer for other plants ?

The answer will be :

Yes why not, most tomatoes liquid fertilizers or granules are made of nitrogen, phosphorus and potassium as primary nutrients and these are the main requirements for almost all the plants, of course they might need different doses depending on their built.
follow our step by step to know if it is totally beneficial to add tomato fertilizer for your plants

First of all, see what does your fertilizer contain:

if you are using any type of fertilization that is manufactured you can actually see the component of the fertilizer with the doses that they come with.

Since you have a tomato fertilizer: you can see the NPK doses that are the main focus ors each in google with the name of the product if it happened that you couldn’t find that information, some products have other nutrients included like calcium magnesium … and those nutrients help the plant face some diseases and grow strong.
you can see all the nutrients that tomatoes needs for different stages in this article

Second, read about your plant:

To see what does the plant needs and its nutrients requirements generally all the plants have 3 major parts of nutrients that they need to take from the soil and those are : primary (NPK) in large quantities , secondary (Calcium, magnesium and sulfur) in medium quantities and finally micronutrient (iron, boron, manganese…) in small quantities.

you can provide those nutrients by constantly working your soil and adding good quality compost that has a diverse mix of nutrients, of if you planted heavy feeders like tomatoes of peppers in the area, it’s wise to add the nutrients especially primary and the missing ones by the next season

Third, be careful

it might sound like a good idea to just add nutrients to your plants without knowing what they need, but you can actually burn your plants of just kill them by adding nutrients that they don’t need this is why it is mandatory to know what does your soil is lacking from either by testing the soil or watching the plant growth closely and reading the signs of missing nutrients

this image help you spot the diffeciencie that there are in the plants and help you learn more about the plant to provide the right nutrients for it