Coleus plants are favorite among gardeners because of their vibrant colors and easy-to-grow nature.

What many people don’t know is that these plants are also a great source of seeds, which can be harvested and saved for future planting. In this post, we’ll explain to you how to harvest coleus seeds the easy way.

How to Harvest Coleus Seeds : Steps

Tips on How to Harvest Coleus Seeds

Harvesting coleus seeds is a simple process that can be done by anyone. All you need is a mature coleus plant and a few supplies. Here’s what you’ll need to do:

Wait For the Coleus Plant to Flower

The first step is to wait for the plant to produce flowers. This usually happens in late summer or early fall. It takes around 60 days for the flowers to mature and produce seeds.

Cut Off the Flower Heads

You have to cut off the flowers once the plant blooms. You can do this with a pair of sharp scissors or a knife. Make sure to wear gloves to protect your hands from the plant’s sharp leaves.

Place the Flower Heads in a Paper Bag

When you are done cutting, put them in a paper bag. This will help to prevent the seeds from scattering. It makes it easier to collect them later on. You can use it for decoration, it’s a great idea.

Let the Flower Heads Dry

The flower heads must now be allowed to dry. This can be done by placing them in a warm, dry place out of direct sunlight. Once they’re completely dry, the seeds will fall off easily.

Wait For the Seeds to Mature

It may take up to two weeks after the seeds are planted before they become mature and ready for harvest. You’ll know they’re ready when the flower heads turn brown and start to crumble.

Harvest the Seeds

Once the seeds are mature, you can harvest them by gently rubbing the flower heads between your hands. The seeds should fall out easily. You can also use a sieve or strainer to collect them.

Store the Seeds

After you’ve harvested the seeds, you’ll need to store them in a cool, dry place. They can be stored in a paper bag or envelope. Make sure to label them, so you know what they are.

Plant the Seeds

Once you’re ready to plant the seeds, you can do so by sowing them in pots or in the ground. Coleus seeds need light to germinate, so don’t cover them with soil. As soon as they sprout, make sure that they are kept moist.

Tips on Growing Coleus from Seed Indoors

Tips on Growing Coleus from Seed Indoors

If you want to grow coleus from seed, it’s best to start them indoors about 8-10 weeks before the last frost date in your area.

Getting coleus seeds to germinate requires them to be exposed to light, so it is important not to cover them with dirt. Keep them moist until they sprout. The following are a few tips for growing coleus indoors from seed:

  1. Fill a seed-starting tray with moistened potting mix.
  2. Sow the coleus seeds on the surface of the potting mix and press them lightly into the mix.
  3. Place the tray in a warm location out of direct sunlight.
  4. Keep the potting mix moist but not soggy.
  5. When the seedlings emerge, thin them out to be about 4 inches apart.
  6. Transplant the seedlings into individual pots when they are about 6-8 weeks old.
  7. Once they are transplanted, please place them in an area with bright indirect light.
  8. Water them regularly and fertilize them every two weeks.
  9. When the weather warms up, you can acclimate them to being outdoors by slowly increasing the amount of time they spend outside each day.
  10. Plant them in their permanent location when all danger of frost has passed.

Why is Coleus Popular Among Gardeners?

Coleus is a genus of flowering plants in the family Lamiaceae. These plants are native to tropical Asia and Africa. Plants like them because of their bright leaves, which come in variegated or solid colors.

A coleus plant can be grown and cared for relatively quickly, making them an excellent choice for beginner gardeners. They are drought-tolerant and can even tolerate some shade.


How to Identify the Flowers on a Coleus Plant?

Coleus plants have small, blue flowers that appear on the plant throughout the year. Usually, the flowers bloom at the end of the summer or the beginning of the fall. The plant produces seeds in these flowers.

What is the best time to harvest Coleus seeds?

It is best to harvest coleus seeds when the leaves have begun turning brown and crumbling. This usually happens two weeks after the plant has flowered.

How Long Does It Take Coleus to Grow from Seed?

From seeds, it usually takes anything from 12 to 21 days for coleus to grow. However, this will depend on the conditions they are grown in. If you start them indoors, it will take longer than if you plant them directly in their permanent location outdoors.

When is the Proper Time to Plant Coleus Seeds?

In late spring or early summer is best time to plant coleus seeds. This will give them enough time to grow and mature before the weather gets too cold. Furthermore, it is best to plant them after the last frost date has passed in your area.


Coleus plants are a great addition to any garden. They’re easy to grow and care for, and they produce beautiful, colorful leaves. If you want to add some variety to your garden, consider harvesting and planting coleus seeds. With a little bit of patience, you can have a vibrant, colorful garden in no time. Thanks for reading.