You’ll need the best fertilizers for geranium to maximize growth. Not all fertilizers are created equal. Gardeners quickly realize that the average products you find in your local gardening store just do not produce the same results as quality products.
Geraniums are a longtime favorite of gardeners. They are relatively easy to grow, beautiful, and release a fragrant smell.
However, to maximize growth and ensure a healthy plant, quality ingredients and the proper N-P-K ratio is needed. Only the highest quality products deliver both of these. Many products on the market these days use marketing techniques to generate marketing hype.
The picks on this website were handpicked to give your plants robust growth. Below, I’ve organized them in an easy to read table with their respective N-P-K ratios. Keep reading below to learn more.
Comparing Our Top 3 Recommendations
At A Glance
- ALGOplus Geranium and Patio Plants Food
- JR Peter’s Professional Fertilizer
- Fertilome Plant Food
- Dyna-Gro Bloom Plant Food
- Liquinox Bloom Fertilizer
These are the products that we recommend. Each of them have the proper N-P-K ratios and utilize top notch ingredients. Be sure to read further below to find more tips on how to maximize the growth of your geranium.
Best Fertilizers for Geranium
N-P-K Ratio: 4-6-8
ALGOplus is the perfect plant food for both indoor and outdoor plants. The organic formula contains a balanced blend of nitrogen, potassium, and phosphorus, all of which help to nourish the soil, which in turn nourishes the plant’s roots. It also contains 12 different minerals, such as sulfur, iron, magnesium, and calcium, all of which deliver essential nutrients to the plant. Geraniums treated with ALGOplus are often healthier overall and display larger, brighter blooms. It is also very easy to use. It can be diluted with water and either sprayed directly onto the plant’s leaves or watered into the soil twice a week.
N-P-K Ratio: 15-15-15
JR Peter’s product is specifically designed to enhance the appearance and health of geraniums and other plants that thrive in soil that has a neutral pH level. The blend contains high levels of nitrogen, which helps to nourish plants, and phosphorus, which ensures that the roots of the plant are strong and grow quickly. It also contains micronutrients, so gardeners can be sure that their plants are receiving the proper vitamins and minerals they need in order to thrive. The fertilizer is water-soluble and can be easily applied while watering the plants.
N-P-K Ratio: 20-20-20
This plant food from Fertilome is designed to work well on both young plants and plants that are already established. The 20-20-20 blend of nitrogen, phosphorus, and potassium helps to nourish the soil and, in turn, produces plants that are stronger and healthier overall. Gardeners will often find that plants treated with it have sturdier root systems and produce larger, more colorful flowers. Geraniums treated with this product also tend to bloom more often and produce more flowers during each bloom. The blooming season might also be extended by using this plant food.
N-P-K Ratio: 3-12-6
Dyna-Gro Plant Food is an excellent choice when it comes to a balanced nutrients that can be used on a variety of plants, including geraniums, in order to promote plant health and encourage blooms. The plant food contains a carefully crafted balance of nitrogen, phosphate, and potash to encourage even growth and to nourish the soil. The mix also contains a number of essential minerals in order to ensure that plants are receiving the vitamins and nutrients they need to grow. In addition, this plant food is low in salts, which helps to reduce the risk of dehydration in plants. This also means that the plant food is unlikely to burn delicate roots or leaves.
N-P-K Ratio: 0-10-10
Liquinox’s product is specifically designed to create larger, more richly colored blooms in flowers such as geraniums. It has a balanced blend of phosphate and potash that helps to create a high acid level in the soil, enhancing the soil’s state and nourishing the plant’s roots. The fertilizer is very concentrated, but it’s easy to mix into a solution, which can then be applied during watering every three or four weeks. Liquinox can also be applied while plants are dormant or budded in order to encourage better overall health and larger, more frequent flowers.
This is the best choice if you are have significant trouble with flowering. It has no nitrogen content so that your plant will not direct energy into expanding foliage; instead it will direct more energy into the development of more blooms.
Maximize Your Growth
To maximize your plants growth, you will need to set up successful circumstances to allow it to grow.
Geranium grow most robustly with either balanced nutrients (N-P-K ratio of roughly 1-1-1) or products with less nitrogen content and more phosphorous and potassium content. The latter will encourage more blooms rather than having the plant divert energy into expanding foliage.
During the active months of growth (warmer weather), you will want to fertilize you plants roughly every 2 weeks. In the winter, you can fertilize less frequently or not at all. The goal in the winter months is to let the plant go into its natural dormant stage.
The ideal soil is one that is loose and has plenty of organic matter. This will allow for proper drainage and good oxygenation.
Geranium do not do well with they are constantly sitting in soggy soil. When such an environment is present, it can result in an increased risk of root rot and root disease.
Geraniums do well when they are watered deeply and allowed to dry in between watering. Water as early in the morning as possible so that the sun can help to dry out the plant itself to prevent any risk of pests or disease. When you are watering, you want to minimize any splashing of watering onto the plant itself. The easiest way to do this is to use a soaker hose so that water can be directed at the roots.
UMass extension mentions how these plants are intolerant of high soluble salts.
Encourage Blooming with Proper Care
If you are having trouble with blooms we recommend removing spent flowers so that the plant can spend more energy in fresh blooms.
Again, another thing you may want to do is use nutrients with less nitrogen content. The last product on our list, Liquinox Bloom Fertilizer, is one such that would be great for this purpose.
To wrap it up, I recommend buying the ALGOplus Liquid Fertilizer and if you are having significant difficulty with achieving blooms, then I recommend the Liquinox Fertilizer. These products will maximize the chances of healthy geranium and increase blooms. Don’t make the mistake of buy any average product at your local gardening store – not all products are created equal. You cannot go wrong with any of the choices above.