Greatest Fertilizer for Geraniums in Pots: My 3 Picks

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Do you want fertilizer assist on your geraniums? On this submit, I focus on my private routine that I exploit to fertilize my geraniums. Fertilizing your geranium crops is absolutely vital, and for those who don’t do it recurrently, your crops is not going to flower to their full potential.

Preserve studying to find out about one of the best fertilizers for geraniums for limitless blooms the entire rising season!



In the event you’ve struggled with getting your geraniums to bloom properly, or perhaps they’re blooming however you need extra, utilizing the best sort of fertilizer frequently is essential. 

Please word that this text refers to crops within the genus Pelargonium which we generally simply name annual geraniums (though they’re really tender perennials).  That is NOT to be confused with the true geranium that belongs to the genus Geranium. 

Though each varieties are perennial geraniums, true geraniums are a lot hardier perennials, whereas Pelargonium crops are rather more tender and can freeze and die in chilly climates and are sometimes merely handled as annuals. 

Geraniums are heavy feeders, notably these in pots. The crops could be slightly liable to nutrient deficiencies for those who don’t fertilize them in any respect, and even for those who don’t fertilize regularly sufficient. 


An instance is potassium deficiency in geraniums the place you’ll have yellowing or browning of the sides of the leaves. 

So with a purpose to have lush inexperienced, wholesome crops which might be loaded with flowers all season lengthy, it is advisable be recurrently offering all of the important vitamins and hint parts. 

Outside crops in pots want numerous fertilizer due to leaching while you water. The fixed watering, notably throughout sizzling climate, will leach out vital vitamins from the potting combine, so crops in pots usually want much more fertilizer than these within the floor. 

There are a lot of varieties of fertilizers that you need to use, however right here is the routine that I exploit to have flowering crops all season lengthy.

After I focus on the three fertilizers I like to make use of, I’ll speak about different vital suggestions on the finish of this submit to make sure that you’ve sturdy crops. 



Early within the season once I purchase my backyard geraniums, I like to make use of a slow-release fertilizer like Osmocote Plus once I pot up the crops.  Merely comply with the label directions and blend within the really helpful quantity of Osmocote that’s really helpful for the dimensions pot you’re utilizing. 

Osmocote Plus comes within the type of little spherical balls that you just combine into your soil. Every time you water, it is going to slowly launch vitamins into the soil. 

This can be a good starter fertilizer to get your plant off on the best foot for the season.

A geranium in entrance of my backyard.


After a few week or two of planting in my pots, I’ll begin to use fish emulsion fertilizer. If you’re rising indoor geraniums, I’d keep away from utilizing natural fertilizers like this as a result of they’re very pungent! However it’s fantastic for wholesome foliage and the general well being of your geraniums. 

I like utilizing Alaska Fish Fertilizer (hyperlink to Amazon), and you may as well use this on any of your different backyard crops as properly.

Just remember to shake up the fish emulsion as a result of it is going to settle on the backside. At this stage of the season, I’ll need my younger crops to extend in dimension and continue to grow with a purpose to set the inspiration for lots of blooming that can happen in the summertime and fall. 

I’ll sometimes use Alaska Fish Fertilizer weekly for a few month or so.

Fish emulsion comprises a better quantity of Nitrogen content material  (versus Phosphorus and Potassium), so it is going to assist with general plant development. This fashion, your plant can get good and massive and robust with a purpose to help plentiful blooms because the season progresses. 

The Alaska Fish Fertilizer NPK ratio is 5-1-1. This stands for the share of Nitrogen, Phosphorus, and Potassium, respectively, and are the principle vitamins that crops want for development. Good fertilizers additionally comprise many different vital vitamins which might be wanted in smaller quantities. 

A wholesome geranium like this one in my backyard could be in virtually fixed bloom with fertilizer routine.


After a few month of utilizing the fish emulsion, I’ll change to a bloom booster water-soluble fertilizer for the remainder of the summer season. I like to make use of Miracle Gro Bloom Booster fertilizer each single week.

Chances are you’ll suppose that is extreme, however it isn’t! I combine in a tablespoon per gallon of water and use this weekly up till early Fall once I’ll cease fertilizing as cooler temperatures come. 

That is additionally an acceptable fertilizer for all kinds of various crops, notably for many flowering annual hanging baskets for full solar, with a purpose to assist them maintain blooming all summer season lengthy. 



Please word that your geraniums might have giant explosions of bloom, and at that time, your plant will decelerate a bit, however there ought to nonetheless be new flower buds forming for those who look carefully below the foliage. Geraniums are fairly messy crops so deadheading the spent flowers is vital.

Snip off the flower stalks as near the bottom of the plant as potential as soon as the flowers are completed. This can assist redirect your plant’s vitality into rising extra leaves and flowers, as a substitute of sustaining previous flower stalks and forming seeds. 

Make certain to brush off any petals which have fallen on the foliage as this could disfigure the foliage over time and trigger brown spots, in addition to encourage pests and illness.


Gentle is the primary consideration in relation to blooming. Fertilizer is not going to trigger a plant to bloom, however it is going to enormously improve it.

If in case you have little or no direct solar, your geraniums is not going to bloom to their potential. Give your geraniums not less than a half day of direct solar, if no more.


Correct watering can be important on your geraniums in pots and is critical to develop wholesome, robust roots. If in case you have a poor root system, your plant itself will endure, not to mention not bloom properly. 

You possibly can simply rot out your geranium crops in the event that they keep too moist, so at all times enable the highest inch or so of the potting combine to dry out earlier than watering once more. If the floor nonetheless feels damp, don’t water!

On the alternative finish, by no means enable your geranium’s soil to dry out fully, particularly for too lengthy. You’ll discover that the decrease leaves will flip yellow, after which it is going to proceed to happen if the drought continues. 

Geraniums should be planted in pots with drainage holes, and wish a well-drained soil, or they’ll rot out simply, notably in colder climate. 

In the event you could be in step with watering and fertilizing, and be sure that your plant has not less than a couple of hours of direct solar or extra, it will present one of the best outcomes for vigorous development and plentiful flowering. 

And do you know that geraniums could be overwintered simply? 

I hope you’ve loved this submit on one of the best fertilizer for geraniums. There are a lot of alternative ways to method fertilizing, however which of them do you want to make use of? Remark beneath. I’d love to listen to!

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