Germinating pepper seeds can take patience. Unlike fast-germinating plants like basil or leafy greens, pepper seeds can take 2-3 weeks to germinate under ideal conditions. If the seeds are older, they may take even longer. In this article, we will share our method for how to germinate pepper seeds, fast!
I’ve been down these roads and can share our tried and true techniques for how to sprout pepper seeds quickly. I will will outline the ideal conditions for a high germination rate, and then show you what tools and methods we use to achieve them.
How To Germinate Pepper Seeds Video:
How Long Do Pepper Seeds Take To Germinate?
First, let’s set some reasonable expectations. How long will it realistically take for pepper seeds to germinate? This will depend on the variety of pepper, the age of the seeds, and the conditions under which the seeds are germinated.
Generally speaking, pepper seeds take 1-2 weeks to germinate. This can stretch to 3 or 4 weeks for hotter varieties like ghost peppers, or for seeds that are over 1 year old. Certain varieties may take longer, but under ideal conditions, most seeds should germinate within 10 days.
The longer the seeds take to germinate, the higher the risk of developing fungus, mold, and other issues. For this reason, we take some actions to speed up the process and reach a higher success rate with each seed.
How to Germinate Pepper Seeds (Steps)
With some pepper seeds in hand, you’re ready to get planting. Just make sure you are starting your seeds at the right time of the year.
- Pepper seeds
- Seed starter mix (ideal medium for seed germination)
- Seed tray and humidity dome
- Seedling heat mat (optional but recommended)
While our method does require a few additional items, the results are worth it. We consistently achieve near-perfect germination rates with our setup, year after year!
- Pre-moisten soil mix. The first step is to pre-mix your seed starter mix with some water. Use a clean mixing bowl and add water gradually, mixing thoroughly. This ensures that the soil does not become hydrophobic.
- Fill containers with soil. Add the pre-moistened mix to seed starting containers, filling to about 1/2″ from the top. Use medium pressure to pack down the seed starter mix.
- Poke small hole in each seed cell. Using a pen or pencil, poke a small hole about 1/8-1/4″ deep in each cell that will be planted.
- Bury seed 1/4″ deep. Add 1-2 seeds per hole. We like to plant a few seeds in each cell to ensure that we get at least one plant per cell (though we usually end up with multiple). Bury each seed with 1/4″ of soil.
- Spritz with water. Sprits the soil’s surface, making sure the seeds are well moistened.
- Place tray on seedling heat mat. Place the planted seed trays onto a seedling heat mat and set the temperature to 80°F (27°C). More about seedling heat mats below. If you don’t have one, place the seeds in a warm location, like above the refrigerator. Light is not necessary for germination.
- Cover with humidity dome. Keep the environment humid and spritz the surface of your seeds daily to avoid drying out. Never let your seeds become dry before sprouting!
- Fan out tray daily. Remove the humidity dome daily to refresh the air.
- Seeds should sprout in 7-10 days. Some seeds may take longer based on age or variety, but most of our pepper seeds sprout within 7 days, including superhots.
This is our basic process for germinating pepper seeds indoors. There are a few important things at play, so let’s talk about what is making our seeds germinate fast.
Tips for Faster Pepper Germination
With the basic steps for germinating pepper seeds, use some of our tried-and-true tips for faster and more reliable germination. Overall, the goal is to keep the environment warm, moist, and well-ventilated until the seeds sprout.
Use A Seed Heating Mat
Temperature is potentially the most important factor in successful seed germination. Most homes are not kept warm enough to be in the ideal temperature range for pepper seed germination.
Pepper seeds will germinate most quickly and consistently when the soil is kept between 80-90°F (27-32°C). Most of our pepper seeds (even superhots) sprout in just 4-7 days after planting thanks to keeping the temperatures up.
80°F (27°C) is pretty warm. Thankfully, there is a purpose built solution for pepper growers. Seed heating mats are basically thermostat-controlled heating pads that measure soil temperature and apply gentle heat to reach the desired temp.
Setup is pretty simple. You place the seed trays on top of the mat, place the metal probe into the soil (this measures the temperature), and set a desired temperature on the control unit.
The unit will then begin heating until the set temperature is reached. I usually keep ours set at 80°F, but feel free to experiment with what works best for you.
“Increasing soil temperature is the single best method for speeding up pepper seed germination”
This knowledge is a great asset for hot pepper growers. If you’re growing Carolina Reapers or any of the superhot varieties, you will definitely want one of these!
Keep It Humid
Moisture is another vital component of successful germination. If your pepper seeds dry out at any time during germination, the seed may fail to sprout. Keeping humidity high can help avoid this problem.
Most seed starting trays will come with a humidity dome like the one pictured below. This locks in any evaporated moisture and keeps the air at nearly 100% relative humidity.
We love Bootstrap Farmer’s high-quality growing supplies. If you want to ‘buy it for life,’ get your supplies from them.
In addition to using a humidity dome, we also recommend spritzing the soil with water daily to prevent drying out. Before the seeds sprout, there is really no need to bottom water, just a few sprays of water directly on the surface to re-hydrate the seed.
Tip: Avoid seed coats getting stuck on the seedlings by keeping the soil medium moist at all times during germination.
We also liked these seed trays, but some of them have cracked after just one year of use. Since we know we are growing plants for many years to come, higher quality trays were justified.
Generally speaking, after the pepper seeds have sprouted, the dome should be removed to allow better aeration. Some plant varieties like to be kept humid after sprouting, but not peppers.
If your seeds are kept under a humidity dome, they will need a refresh of air every once in a while. Seed germination requires oxygen, so make sure that you remove the dome and allow some fresh air to reach the soil.
Since the seeds don’t use much oxygen, this can be done every other day or so before the seeds sprout.
Tip: Use the dome vents to allow some air to enter the seed tray. You can also run a desk fan on low for a few hours a day in the room to circulate the air.
Plant in Seed Starter Mix
Seed starter mixes are specially formulated mixtures for germinating seeds. They generally have no plant nutrients added and allow for plenty of aeration. You’ll see peat moss, vermiculite and perlite as common ingredients in these starter mixes.
Using potting soil to start seeds can work fine, but you run the risk of burning seedlings when they emerge or not allowing enough oxygen to reach the seeds for germination.
Try this seed starter on Amazon.
Once the seeds sprout, they should be moved to nutrient-rich soil. Follow our guide to starting pepper plants from seed for the next steps after germination.
The Paper Towel Germination Method
If you are having difficulty sprouting your seeds quickly, some recommend the paper towel method. However, we do not recommend this technique. We have never had any trouble germinating our seeds directly in soil or seed starter mix.
If you are having difficulty germinating, consider the age of the seeds. If they are very old, or were not stored properly, they may not be viable, or may take longer to sprout.
Learn more about saving pepper seeds here.
Note: We only recommend trying the paper towel method as a last resort. We have had better success sprouting pepper seeds by planting directly in soil with a heating mat. If you don’t have a heating mat, try above the refrigerator or near a heat source for more warmth.
After your seeds germinate, give them plenty of light. After a week or so of growth, you can begin to fertilize at 1/2 strength.
I hope this article helps you achieve a high germination rate for this year’s pepper seeds. Sprouting pepper seeds is an exciting time of the year, just be sure to check in every day on progress.
Good luck, and feel free to share any other pepper seed germination tips you may have below!
Wednesday 15th of March 2023
After the sweet peppers have germinated do you leave the heating mat on under the lights? Mine have just germinated. When do I put the fan on and how many hours per day. Thanks for all your help.
Friday 17th of March 2023
No, once the seedlings sprout, you can remove the heating mat and humidity dome and get the plants under light. turn on the fan right away as well, letting it run for around 3-4 hours per day, or just 24/7 if you don't have a timer (though then you'll need to water more frequently as the breeze dries out soil).
Sunday 19th of February 2023
I had no idea I was supposed to take off the dome daily and let it dry out! I tend to keep all seeds covered until sprouted which as you probably guessed, results in some pretty green fuzzy stuff. Thanks for all the awesome content and I'm fighting the urge to not start my peppers too early this year (but I'm so excited to get going).
Saturday 1st of October 2022
Hi I heard some people say that top prunning pepper plant is bad so what do you think I should do
Thursday 6th of October 2022
We don't bother topping our plants anymore. We only really recommend bottom pruning to keep lower leaves out of soil.
Wednesday 9th of March 2022
I started pepper seeds 11 Days ago and wrapped in Plastic, have on heat mat Plastic shows moisture is There still no germination Only sprayed once and did Bottom water once. ??? Still no germination Any ideas
Sunday 19th of February 2023
@Karen Zorn, just wait a couple of weeks more to make sure they are not just being slow to germinate.