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The life cycle of pepper plants is an interesting one, and can inform your planting decisions and, in the right locations, even help you to keep pepper plants alive for three years.
Or maybe you want a perpetual pepper plant bed, where new pepper plants replace old plants in a self-perpetuating manner. Understanding the pepper plant life cycle can help you get there.
I’m a big fan of really understanding the plants I want to grow, as it lets me give them the best possible conditions and get the biggest, tastiest harvest from them. For every new plant I grow, I take a look at their life cycle first, as it tells me what nutrients they need the best planting location, and what I can expect from them as they develop.
Peppers are short-lived tropical plants that are mostly grown as annuals (single-year plants). They’re killed by frost (find out more about peppers and low temperatures here), so people in climates with low winter temperatures replace their peppers every year. However, in warmer climates where temperatures never dip close to freezing, you can, in fact, keep them growing and producing fruit for up to three years.
Life Cycle of Sweet Bell Peppers vs. Hot Peppers
The life cycle of bell peppers compared to hot peppers is essentially the same, but bell peppers mature faster, but it does depend on the pepper plant variety. Sweet peppers, like mini bell peppers, can be ready to harvest in as little as 60 days. On the other end of the scale, hot peppers vary but, some chili peppers, like jalapeno peppers can take up to 160 days to mature.
Pepper Plant Life Cycle Step 1: Pepper Seeds Germinate
As you’ll see in my guide to growing peppers, sweet peppers and chili peppers alike need a nice, nutrient-rich seed starting mix where the seeds are sown thinly, and keep the soil evenly moist. To germinate, peppers need warmth. Around 70 degrees Fahrenheit or 21 degrees Celsius is ideal.
Pepper seeds take anywhere from 7 to 21 days to germinate, so don’t lose patience or assume your seeds weren’t viable. Growing peppers is a slow process to start with. But, if you’ve kept the conditions right, you’ll eventually see tiny seedlings poking their heads out of the moist soil.
Pepper Plant Life Cycle Step 2: Pepper Seedlings Grow
Assuming you keep the temperature above 70°F or 21°C, the soil remains moist, and there’s plenty of sun light, your pepper seedlings should grow rapidly. As the temperature and daylight hours increase, so will the growth rate. Your young plants will soon be produce multiple pairs of true leaves and you’ll be ready to plant peppers in roomier pots.
Transplanting peppers is easy and gives the young plants fresh nutrients and more room to grow. Transplant pepper seedlings around four weeks after germination, when they’ve got three sets of true leaves and are big enough to handle safely.
Pepper Plant Life Cycle Step 3: Pepper Plants Mature
They can stay in 3-inch pots for another 4 weeks, as the root system and foliage continue to develop, during which you can practice hardening off to create strong, healthy plants. After this point, you’ll need to transplant them again if you’re growing in containers or there’s still a risk of frost, or plant them outside to be productive garden plants.
Pepper Plant Life Cycle Step 4: Flowering
Flower buds appear fairly early and, to help make your plant more robust, you may want to nip off those early flowers and otherwise prune your peppers to improve health and vigour for the rest of the season.
Small, white or yellow bell-shaped flowers appear, either alone or in clusters of two or three. They require insect pollination to turn into fruit, so companion planting peppers with brightly-colored pollinator attractors is a smart move.
It’s true that peppers also self-pollinate, by pollen dropping from the anthers to the stigma with no intervention, but for the best pollination rates and the most fruit, your peppers need insects!
Pepper plants continue to produce flowers until the temperature drops below 70 degrees Fahrenheit (21 degrees Celsius). However, if nighttime temperatures dip below 55F, you’ll experience flower drop, where most or all of the existing flowers fall off the plants.
Pepper Plant Life Cycle Step 5: Pepper Flower Pollination
Pollinators work their magic on the flowers of your pepper plants whether that’s a huge bell pepper like an Ozark giant or you’re growing a jalapeno pepper plant, cayenne peppers, or ghost pepper plants.
Once pollination occurs, if conditions remain favorable, fruit starts to set.
Pepper Plant Life Cycle Step 6: Pepper Plants Set Fruit
The ovaries of the pepper plants start to expand, once the female flowers are pollinated. The ovary turns into a fleshy-walled pericarp, enclosing at least two locular cavities.
The ovaries are essentially the pepper fruits that you eventually harvest and eat. But pepper plants are sensitive, so good pepper growth depends on favorable outdoor conditions.
The pepper plant’s ovaries continue to expand and ripen the seeds inside. The pericarp makes up the edible walls of the pepper fruit, and the locular cavities are the hollow spaces where the (eventually) ripe seeds grow.
RELATED ARTICLE: How to Stop Pepper Plants Falling Over
Pepper Plant Life Cycle Step 7: Fruit Ripens
Once the peppers reach their full size, even though they’re still green, you can harvest and cook them. Or, you can let the immature pepper fruits ripen. As the fruits mature, sugars, capsaicin, and other flavorful compounds increase and intensify in the flesh of the peppers.
As these flavor compounds accumulate, the taste of the pepper sweetens and intensifies. Bell peppers and sweet peppers have more sugars and no capsaicin, compared with jalapeno peppers and other hot peppers.
The bright green chlorophyll in the pepper breaks down as the fruit matures, instigating the color change that occurs as the fruits ripen.
Pepper Plant Life Cycle Step 8: Harvesting Fruit and Saving Seeds
Your plants produce peppers until the first frost, but you’ll need to harvest them before the frost damages them and rot sets in. When the plant sets fruit, the fruits stay green until they reach their full size, then they start to mature.
While immature peppers are almost always green, mature ones can be orange, yellow, red, brown, or purple, depending on the variety.
While you can eat green peppers, and they’re great for cooking, they’re best when you leave them to fully ripen.
When you’re ready to harvest peppers from your vegetable garden, grasp the fruit in one hand and use pruning shears, scissors, or a sharp knife to cut the stem joining the pepper to the main plant. Make sure you leave around an inch or two of stem connected to the pepper.
If you don’t harvest your peppers in time, the stem starts to decay and the peppers fall to the ground. While they’re still usable at this point, if you leave them on the ground for long, the fruits will start to rot, too.
If left to their own devices, the fallen fruits split open revealing the ripe seeds which can, in turn, survive winter and germinate themselves in the spring. While a random pepper seed sprouting isn’t generally cause for excitement, in the right climate, this can be a bonus.
If you live in a hot region where temperatures never dip anywhere close to freezing, where a pepper is a perennial plant, rather than a short-lived annual, you can create a self-perpetuating pepper bed.
In this kind of area, pepper plants can produce fruit for up to 4 years, after which time they’ll need replacing with new plants. If you have new growth plants pushing up from the seeds of your fallen peppers, you have those new plants already, in-situ, and won’t have to worry about planting in seed cell trays or caring for newly transplanted seedlings. You simply pull out the old plants to make room for the newer ones, and so the cycle continues.
And did you know you can save pepper seeds to grow in future years? Well, you can, assuming you’ve grown heirloom, or open-pollinated seeds, and not hybrids. Hybrid seeds may be resistant to a pest or disease or be bred because of their shape and color, but they don’t produce stable, viable seeds, so you can’t reliably save seed. Either they wont grow at all, or they’ll grow but won’t produce fruit. If the plant sets fruit, which is a very big if, then there’s a good chance that fruit will be poorly shaped, won’t taste good, and may not reach maturity, even if the plant has healthy foliage development.
So, assuming you’ve got open-pollinated pepper plants, now is when you’d select the best, healthy plant in your crop, and choose the best looking pepper from it. Leave that fruit alone until it reaches full maturity and begins to wrinkle on the plant. Ensuring total maturity ensures optimum seed viability.
You simply open the pepper, remove the seeds, and lay them out on paper towel to dry in a warm area, out of direct sunlight. And turn them every few days to ensure even drying and avoid rot.
After a few weeks, when they’re completely dry, store the pepper seeds in a dry, airtight container until you want to plant them.
FAQs
How long do pepper plants live?
In many places, pepper plants only live for a single year, between the last and first frosts, if grown outdoors in the vegetable garden. In a heated greenhouse, peppers can last three to four years. In hot climates, peppers can last for up to four years.
In some tropical climates, peppers can live even longer, growing into small, tough, vigorous bushes.
Of course, this information assumes healthy plants that don’t get infested by insects or infected by pathogens. And, assuming you fertilize peppers with nitrogen fertilizer, reduced nitrogen fertilizer, and a more phosphorus-rich blend at different times during its lifecycle.
How long do pepper plants take to grow?
Pepper plants take between 7 and 21 days to germinate, and up to an additional 150 days to mature into ripe peppers. Bell pepper varieties like bell boy often have a shorter maturation rate, taking as little as 60 days to reach full size, and up to 90 days for larger varieties to fully mature.
How cold is too cold for peppers?
2 degrees Fahrenheit is too cold for peppers. That’s 0 degrees Celsius. Frost kills pepper plants, and they won’t recover. Between 33 and 40F (1-4C), pepper plants suffer from significant cold injury but can potentially be saved if you don’t let this go on for too long. Between 41 and 50 degrees Fahrenheit (4-10 Celsius), the plant doesn’t suffer injury, but growth slows to almost nothing until the temperature rises. Take a look at our article on what temperature is too cold for peppers for more details.
How long after flowering do peppers grow?
How long after flowering peppers grow depends on the variety. However, in general, you’ll start to see tiny peppers in as little as 7 days after flowering. Pepper flowers open around three hours after dawn and last for up to three days. If they’re pollinated in that time, the ovary that forms the pepper starts to swell and is visible in just a few days. Between 45 and 50 percent of flowers will set fruit.
How many peppers does one plant produce?
How many peppers one plant produces depends on the variety you choose, how much warm weather you have, the soil temperature and condition, the health of your plant, and more. However, on average, large-fruited varieties such as a classic bell pepper produce between 5 and 10 fruits per plant. Small-fruited peppers, on the other hand, can produce as many as 70 peppers per plant.
How can you tell if a pepper is pollinated?
You can tell if a pepper flower is pollinated because it first wilts and then, at the base of the pepper flower, the ovule, or ovary, begins to swell as it turns into a fruit.
Is my pepper plant dead or dormant?
If your pepper plant has been exposed to a frost, it’s dead, not dormant. However, in milder climates, or if you provide sufficient protection, a pepper plant can go dormant or die back to the ground before remerging in spring.
If, however, you see large black spots or streaks on your peppers, or all the leaves turn yellow, then the plant is more likely to be dying from a pathogen or maybe from overwatering and should be discarded. Leaving infected plants in place risks infecting all the other plants in the vicinity with the same disease.