Geraniums Seeds: Harvesting, Growing and Buying Guide

Geranium flowers along with fruit
Geranium plant bearing flowers and ripped fruits in the garden

Geranium can reward you with cleft leaves and white, pink, purple, or blue flowers containing distinctive veining, and it is easy to reproduce too.

If you remember, you can populate Geraniums through leaf cuttings and the old-school method; seed propagation. 

Generally, Geranium produces 4-6 mm long black or brown seeds after flowering in spring, summer, and early winter. You need to soak them in a damp paper towel for two days and maintain a temperature of 70-75 degrees Fahrenheit to germinate. 

Ripped Geranium fruits
Ripped Geranium fruits have fallen from the plant.

If you are a beginner, you need additional requirements to know before you jump into making mistakes in collecting and germinating seeds.

So, continue reading the entire article.

Overview of Geraniums Seeds

Geraniaceae is widely known as horticultural bedding plants.  

However, most Geraniums do produce seeds; some of the seeds look like oat seeds, while others look like pepper. 

Let’s look at the overview of Geranium seeds to know them better.

ColorBrown, black
Size4-6 mm long
Weight~0.0045g
Shape Round and oval with awn
BlossomDifferent shades of white, pink, red and purple
Blooming SeasonSpring, summer and through early fall
Harvest SeasonAutumn
Germination TimeOne to two weeks
ToxicityToxic to pets
Conducive Temperature70 to 75°F

How to Collect Geraniums Seeds?

While extracting the Geraniums seeds, you must be careful as a slight wind can easily drift the seeds.

Do not prune your Geraniums flower at the end of the season to enable them to form seeds. As Geraniums only produce seed pods when the bloom has dried entirely.

When they’re ready, they open, and the seeds launch. Likewise, it may take a few months to produce mature seed pods.

Choose a flower with the brightest bloom to mature to ensure healthy seeds.

When you see green spikes with up to five seed pods form at the base of a flower on a geranium, that’s when to catch the seeds before it ripens. Once riped, the seed pods can spring open anytime.

Geranium flowers and buds
Geranium flowers and buds are hanging on the stem.

Likewise, they don’t require a cold period like some seeds, but they must be dried before germinating. Once they dry, the seeds pop out of the seed pod.

The seed pod on Geraniums are like long thin spikes that develop out of dying flowers. The flowers must be exposed to sunlight and again left to dry on the baking sheet. 

You can ensure that the ready-to-open seed pods are green to black.

Here are some essential tools needed to extract seeds from the Geranium plant.

Essential EquipmentsSpecification
ScissorsFor cutting the dried flowers
Ziploc BagTo place the seeds
Mesh BagsTo prevent seeds from wind
TweezersTo extract the small seeds from mericarps

Steps to Harvest the Geraniums Seeds

There are two ways you can extract the Geranium seeds.

The first way is to put the mesh bags on the seed head and close them up, so the seeds develop inside the bag without drifting from the wind.

Geranium seeds on palm
Geranium seeds have been stored on the palm.

You can follow the instructions for the second method to collect the seeds.

  • Firstly, cut the dehydrating Geranium flowerheads that have spiky seed pods.
  • Place the flowerhead under the sun for the flower to turn dry before harvesting the seeds.
  • Identify the seed pods, mostly brown with hairs, and dry them for 2 days in the sun to easily remove the mericarps.

Garden Geranium does not have mericarps, and Geranium phaeun seeds rarely pop out of their mericarps, so you need not worry if they do not squeeze out.

  • However, other different varieties can be easily popped out of the mericarps by squeezing them or rubbing them in a circular motion in your palm. If they are stubborn, you can also use tweezers to take them out.
  • Save them in the ziplock bag or brown paper bag with labels for further use.
  • You can place them in a refrigerator or cool place where the temperature will be below 55 degrees Fahrenheit.

After successful extraction, plant the seed immediately or the following spring because Geranium seeds are generally viable for a year only.

Where to Buy Geraniums seed?

If you think the seed extractions are too much of a hassle for you, I have your back. Below are some of the online stores you can buy Geranium seeds from.

ShopsDelivery time
Plant World SeedsWithin 7 working days
AmazonWithin 7 to 13 days
EtsyWithin 1-3 business days
Best Seeds OnlineVaries according to location

Can Geraniums Grow from Seed?

Geraniums can be easily propagated through seeds, although it takes patience.

The seed-grown varieties are often smaller and produce more blooms than cutting-propagated plants. 

Likewise, hybrid Geraniums produced from seed have exceptional vigor, heat tolerance, and disease resistance and are free-blooming.

Geranium seedlings in container
Geranium seedlings have been placed in the container.

Geranium seeds should be sown in early to mid-February to produce flowering plants for spring. The seeds take 13 to 15 weeks to grow and produce blossoms in spring.

However, it can be influenced by the time of year the seeds are sown and the amount of light and temperature.

Materials Required to Grow Geraniums Seed

You must be prepared with different materials to help germination, and some of the essential materials are listed below.

MaterialsPurpose
Soil Potting MixFor planting them
Germination TraySupport for the germination of the seeds up to the seedling stage
Heating PadTo aid in the germination process
Plastic bag or glassTo maintain the humidity

Germinating Geraniums Seeds

Follow the steps given below to sow and germinate the Geranium seeds successfully. 

Step 1: Prepare the Seed and Potting Mix

  • To plant your extracted seed in the following spring, you should keep them in the refrigerator for dry stratification to speed up germination.
  • You should also pre-soak the seeds on damp paper for two days to soften the seeds.
  • Likewise, the soil should be a mixture of vermiculite, peat moss, and perlite and moistened before putting it in the seedling tray.

Step 2: Planting in the Germination Tray

  • Choose a clean and good drainage germination tray to avoid potential damping off fungus. 
  • Use the prepared soil mix and pat each cell of the tray very lightly to settle down the soil.
  • You can put two seeds per plug to increase the probability of getting germination success.
  • Apply the soil lightly to the top of the seeds or use vermiculite to cover them.
Germination try containing potting mixes and seedlings
Germination try has contained potting mixes and seedlings.
  • Water the seeds sparingly using a watering can and ensure they are not overwatered. 
  • Cover the tray with clear plastic or glass to maintain humidity level.
  • Place them in a warm position where they will receive bright indirect light.
  • You can also place them on a heating pad and under the fluorescent light to speed up the germination.
  • Remove the plastic or glass cover when your seeds germinate in 5 to 7 days.

Step 3: Transplant the Sprouts

Lastly, use a well-drained commercial potting mix and transfer the seedlings into a plastic pot.

You can transfer the seeds to a larger pot once they have about three sets of leaves and the roots have filled the germination tray. Also, the pot should be about two to three inches.

Potting soil spoiled from pot
Potting soil has been spoiled from pot.

Remember to handle the small seedling by their leaves, as the thin stems can break off easily.

Besides, you need to plant the Geranium seedlings in a shallow container with holes in the bottom for proper drainage and to prevent root rot.

Tips to Care for Geraniums Seeds During Propagation

Proper care is critical for the successful germination of Geraniums.

Remember the following crucial instructions to take care of your Geraniums during germination.

  • Geraniums seeds germinate fully in bright indirect light, so put them in south-facing windows.
  • You can also grow the seedlings under fluorescent lights for 12 to 16 hours a day and no more than 4 to 6 inches above the growing plants for the best result.
A tray containing seedlings
Geranium seedlings are growing in the germination tray.
  • Geraniums prefer a little heat during the germination, so use a heating pad underneath the germination tray.
  • Maintain the ideal temperature for germinating Geraniums is 22 to 26 degrees Celcius.
  • Water them sparingly using a mister when the soil surface is dry to the touch.
  • Finally, you can notice that Geranium seeds will grow roots in about four weeks of sowing.

Tips to Care for Geraniums Seeds after Propagation

After the successful germination, you might think your work is over, but it is not. You must care for your Geraniums to ensure they grow healthy.

Requirements Specifications
Sunlight Filtered light of 4-6 hours a day (Except for the ivy geranium, which grows best in light shade)
Watering 1–2 times per week when the soil feels dry
Temperature70 to 75 degrees F during day
60 to 65 degrees F during night
HumidityNo higher than 75%
Fertilization 200 to 250 ppm of nitrogen
Recommended Fertilizer types: 15-15-15 (Geranium Special), 15-16-17 (Peat-lite), and 20-10-20 (Peat-lite)

You need to apply a dilute fertilizer solution once every two weeks to your Geranium.

Also, be aware of pests like aphids, cabbage loopers, scales, and slugs which can damage the plant and affect the foliage.

You can try to remove them by hand using gloves or use neem oil or insecticides to remove them.

Another common fungal disease in Geranium is botrytis leaf spot; hence, remove the discolored leaves and use fungicidal sprays to prevent them.

If you want to plant the Geraniums outdoors, acclimatize them in a shady location for 7 to 10 days and gradually expose them to a longer period of sunlight.

Conclusion

Growing Geranium from seed is one of the easiest ways to propagate them and will make the bare spots bright with its colorful blooms.

The extraction of seeds can be tedious, but the end result is worth all the hassle.

You can easily grow a healthy and lush Geranium with all the tips and techniques I have mentioned above.

If you own a gardenia plant, you may also wish to read the complete buying and grow guide

Good Luck!

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