Why Are My Geraniums Not Blooming?

Geraniums (also known as Pelargoniums, also known as Storksbills) are heat and drought resistant plants, with the majority of species indigenous in South Africa and can display flowers throughout the year in warmer climates when the right conditions.

The main reasons why geraniums aren’t blooming is due to the soil being damp, too much shade cold temperatures, and the high nitrogen fertilizer. Geraniums need well-drained soiland potassium fertiliser, full sun and temperatures that are consistently higher than 55 degrees (12degC) to flower in the summer.

Read on to find out the reasons why your geraniums aren’t blooming and the best way to apply the most effective practices to help geraniums flower to their maximum capacity…

Over Watering or Slow Draining Soils Prevents Geraniums Blooming

There are approximately 250 species. the majority of Geraniums ( Pelargoniums) originate from South Africa where they bloom throughout the year long in soil that tends to dry out somewhat because of warm weather and between periods of rain that are not frequent.

Imitating the conditions for watering and soil humidity that they have in their native habitats is essential for the health of plants and to encourage flowering.

So, two of the most common reasons that germanium does not bloom is due to:

  • Too often watering to ensure that the soil stays damp or moist.
  • Slow draining soils like clay or due to the boggy areas of low-lying.

Boggy, damp soils can cause stress to the geranium and trigger fungal diseases like root rot that hinders respiration of the roots and reduces the potential of flowering for germanium.

geranium close up

If your geraniums aren’t blooming, reduce the frequency of watering to give the soil the chance to dry slightly between watering sessions.

Generally, it is recommended to water geraniums in containers and pots once a week in the summer when there is very little rain and you only water the geraniums that are planted in garden boardsers in times of drought.

The most important thing is to alter the frequency of irrigation (so it is possible for the soil is able for drying out) to match your particular climate and the conditions of the weather.

To determine if your geraniums need watering, check the soil up to the depth of a finger, If the soil feels damp, then you can defer watering for a couple of days, however when the soil begins to feel dry, give your geranium a thorough soak.

If your garden soil is sloppy or drains slowly due to the clay soil or the compacted dirt, then plant geraniums in pots hanging baskets or containers to mimic the ideal dry soil conditions, which increase the chances of geraniums flowering.

Transplant all geraniums as an immediate priority If the soil is regularly damp. This should be done in an area with full sun and well-drained soil, to improve the chances of a beautiful display of flowers.

Always give geraniums an adequate amount of water because this helps the roots to develop and grow into the soil. It also increases the plant’s resistance to drought.

Potted Geraniums Not Flowering

Geraniums flourish and bloom abundantly in pots because of the favorable drainage conditions. However, it is essential that your container or pot is equipped with drainage holes at the bottom to allow excess water to drain away.

If containers and pots are not equipped with drainage issues the soil gets boggy and the plant either dies from root rot or is stressed by water and does not bloom.

This is especially the situation with indoor germanium, as gardeners use a saucer or decorative pot on top to prevent water from draining out of in the base of the pot onto furniture, so make sure that water flows out of the pot in order that the soil doesn’t get clogged with water.

For germanium that is potted outdoors, I suggest a pot approximately 12 inches in diameter to ensure that the pot can hold sufficient soil and thus nutrients to allow the geraniums to bloom.

In warmer climates, a bigger pot can retain water and not dry out too fast on hot baking days.

The use of fertilizers becomes more essential for potted geraniums that want to bloom because the roots will exhaust the pot’s nutrients which can reduce flowering.

Too Much Fertilizer Prevents Geraniums to Flowering

Geraniums aren’t necessarily heavy feeders, so fertilizing them often or in a much concentration could encourage the growth of foliage, but and can harm flowers.

This is especially the case when it comes to the high Nitrogen fertilizers.

Reduce the frequency of fertilizer to at least once every two weeks using a balanced general liquid fertilizer that ensures that the ratio of Nitrogen Phosphorous, Nitrogen and potassium is equal (10: 10: 10 NPK).

When flower buds begin to appear, geraniums show more flowers by fertilizing with a higher amount of potassium (as potassium encourages flowering).

Foods that are suitable for tomatoes have an adequate amount of potassium. They are excellent to promote germanium blooms. you can choose a specific product designed for geraniums that is available on Amazon and garden centers that contain more potassium and promotes blooms.

Not Enough Sun for Geranium Flowering

The most important elements for the promotion of germanium blooms can be the quantity of sunshine each day.

To get more vibrant blooms, place your geraniums in an area that receives about 6 hours of sunshine each day.

A lot of shade can cause Geraniums to become leggy and show less flowers.

Morning sun, followed by afternoon shade is perfect for all climates, and the majority of germanium cultivars are flowering and to be an overall healthy plant.

In cooler climates, such as those in the Pacific North West or the UK Geraniums bloom best when they are in full sun. In hotter climates like Southern California or the Mediterranean germaniums can benefit from some shade from the sun’s glaring midday heat which is why they prefer early morning sun, followed by shade.

If your geraniums aren’t blooming, shift them to full sun outside and then to a sunny indoor window so that the geranium have the energy needed to flower.

Cool Temperatures Prevents Flowering

Geraniums bloom throughout the year in ideal conditions, such as in their natural habitat of South Africa and only flower in cooler climates if the temperature at night stays always above 55deg F or 12 degrees Celsius.

So the reason why that your geraniums haven’t bloomed could be that it’s too late in the season and they’re waiting for warmer weather.

If the weather stays constant warm, geraniums will bloom throughout the summer until the temperature fall in the Fall.

It is important to note that any significant change in temperature could result in stress on geraniums therefore, the transfer of a potted geranium an area that is warm to a cooler area can result in shock that can stop flowering.

The geraniums should be moved outside for a short time each day for about two weeks. Gradually increase the time they spend outdoors to acclimatize them to the change in temperatures. The geranium will be less likely to be affected by shock, and thus more likely to bloom.

Be aware that geraniums generally aren’t frost-tolerant, and must be moved indoors when potted or used as a flowering annual in gardens with cooler climates.

Soil Conditions Required for Geraniums to Bloom

Geraniums are heat and drought resistant, but they need specific conditions for their soil to flourish and bloom to their fullest potential:

  • Geraniums require a lightly soil that is friable to allow the growth of roots and a good drainage (geraniums don’t like moist soil). Make sure to amend the area of planting with multi-purpose compost prior to planting, and stay clear of the naturally damp or boggy areas in the garden.
  • The soil is compacted and heavy clay. soil, or slow draining soil isn’t ideal for growing geraniums. it is recommended to plant them in containers, pots or hangers instead.
  • The more sand-like or deficient in nutrients your soil is, the more the use of fertilizers is needed to allow geraniums flowers. A general, all-purpose fertilizer is appropriate for geraniums. However, when flowers begin to emerge, the use of a fertilizer with high potassium (such like tomato feed) encourages the growth of flowers throughout the summer.

In soil that is well-drained and light that is amended with plenty of compost (and using fertilizer) Geraniums are more likely to show an abundance of flowers.

Key Takeaways

  • Geraniums are not able to bloom when the soil is constantly wet, has too much shade or fertilizer with high nitrogen levels cold temperatures, or in pots that are small and have low nutrients.
  • Geraniums require a well-drained soil and full sun. They also require potassium fertilizer, and constant temperatures of 55 degrees Fahrenheit (12 degC) in the evening to bloom.
  • Geraniums originate native to South Africa and prefer to soil that is dry in between watering sessions to flourish and bloom.


Went from a bad gardener to a half-decent one over 10+ years. Super happy to share my tips and tricks with you :)