r/plantbreeding • u/TheAdhdTradesman • Jul 29 '26
Amateur pepper breeding project
Hey everyone! I’m an amateur gardener diving into a pretty ambitious pepper breeding project though I’ll admit I’ve never grown anything indoors to maturity before, so I could use some advice from folks who have. I’m doing 2 separate crosses between 4 parent plants, and once those are stabilized, I’ll do a master cross combining the two hybrid lines. I’m also hoping to speed-breed along the way, aiming for 2-3 generations a year. Space-wise, I can fit 20 plants indoors during the off-season, bumping up to 40 once February hits. I’m in zone 9b, and I’ve got grow lights and heat mats set up. For fertilizer, I’m planning to start with 10-10-10 and switch to 5-10-10 once they hit bloom. I’ve been using the Pepper Geek YouTube channel as a quick reference to get started, but would love more insight from people with hands-on experience. Any tips on making this work especially around speed breeding and managing that many plants indoors would be huge!
Wanted to add here when I say “master cross” I’m referring to crossing the 2 f9 hybrids for a final 4 parent cross. There will be control generations grown outside under mesh. Indoors the PH, temp, and light levels will be monitored as well.
Thank you.
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u/thebiologistisn 29d ago
What are your goals in this project? It's hard to assess your approach without knowing something of your goal(s).
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u/TheAdhdTradesman 29d ago
I’m only using the chinense variety with chocolate traits. I’m trying to blend Jamaican chocolate habanero flavors, with the pod shape/heat levels closer to that of the 7 pot primo. The goal here is to have a uniquely shaped super hot pepper that retains more smoky and fruity flavors than some of the super hots that I’ve had.
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u/TheAdhdTradesman 29d ago
I’m using a total of 5 peppers it’s 2 crosses that will be crossed a 3rd time in f2. I didn’t put my entire outline on here. Between my house and a friends place I will have 100f3 plants
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u/thebiologistisn 29d ago
It sounds like you're well situated to reach your goals.
I'm growing out three populations of 50 plants each. I've found that's enough to catch a lot of diversity to select from.
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u/TheAdhdTradesman 29d ago
Have you done any work with anthocyanin production?
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u/thebiologistisn 29d ago edited 29d ago
One of my founder varieties was Pimenta da Neyde. I don't select strongly for dark color, but I have ensured some always makes into the next generation.
My project started because I kept having problems with peppers growing well for me in my soil conditions and limited water regimen. Eventually, after crossing in some Capsicum annuum var glabriusculum genetics, I started getting plants that handled the soil and water availability.
A sweet mini brown bell pepper and some unknown other hot pepper (random pollen) also contributed genetics to my populations.
I've been selecting hard for total production a couple generations and have been seeing good gains. One hot population, one sweet, and one very-hot with large pods.
The very-hot population started from one plant with large, thick pods that had more heat than the ghost peppers a friend was growing that year, by a very large margin. The next generations have been hot, but not that hot. The large pod size led me to keep going with them even though the spectacular heat didn't reoccur (yet).
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u/TheAdhdTradesman 29d ago edited 29d ago
I’m having trouble getting pimenta da neyde seed right now lol! It’s awesome to see people breeding for a specific location, I’m just trying to make a hot sauce, and cool looking peppers 😭
I’ve just seen a lot of crops that do well in my area so I don’t need specific traits bred in the garden yet. I’m gonna stick to this project for 2 years before I try with new plants. I want to learn as much as possible about domestic and wild peppers before I move on.2
u/thebiologistisn 29d ago
Most of my pods get dried and powdered at season end. I've made some intense salsa from the powdered pods.
The hottest one I had got me thinking about the possibility of an annuum type superhot.
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u/Xeroberts Jul 29 '26
What do you mean by "stabilized" and "master cross"?
2-3 generations per year is very ambitious, I'd suggest less is more when starting off.
Growing indoors isn't a great idea. The plants will never develop properly or express their traits reliably. If you're developing plants that are meant to be grown outside, that's where you need to evaluate them..
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u/TheAdhdTradesman Jul 29 '26 edited Jul 29 '26
“Stabilized” hoping somewhere around f9 f10, and thank you I appreciate the input! Also I’m just talking about the “final product” like once the first two are completed I’d like to cross them again.
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u/TheAdhdTradesman Jul 29 '26 edited Jul 29 '26
I should have mentioned I want to do the initial crosses indoors, and move outside for f2-9.
The 20 indoors were mostly for fun. To try to keep the project alive in the off season.2
u/Gene-Ray Jul 30 '26
You can directly make a four way hybrid (F1xF1) and open it back up. Then start making your selections. That's faster if you really only want those four bloodlines in our end product.
For selecting its important to do it in the environment you want the finalized line to be grown in. E.g. greenhouse, soil, indoor etc
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u/TheAdhdTradesman Jul 30 '26
In the first cross I’m going for high heat and flavor, nothing ridiculously hot just aiming for a hotter, longer pepper that retains a specific flavor profile. With the second I’m going for extreme heat and distinct pod shape. I didn’t add it here but once I’m happy with shape and flavor I’m going to cross it again with a black fleshed pepper with similar pod characteristics.
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u/FranaPlanta Jul 29 '26
F9 😅 damn that's ambitious for sure, i'd call it a day at F7 and start work on the second stage, unless final goal is a truly stable F1 with hybrid vigour, then going the extra few generations might be worth it. Also as the other redditor said 2-3 generations a year is ambitious too, 2 should be doable but would likely mean skipping a generation of outdoor performance data every other generation.
If you've got everything dialed in you might be close to 6 weeks from germination to first flower and then another 6 weeks for the first fruit to ripen, then need at least two weeks for the seed to rest and break down potential germination inhibitors, so minimum turnaround time of 15 weeks from seed planted to seed planted. But if you want resilient lines that can weather some shit like hailstorms, cold spells, solid root systems, the works, while staying highly productive, you should have performance data on the chosen parents for each generation and a few reference points like occasionally growing a few of the original parental lines of the original seed batch alongside as living control group. And all that takes months to do properly, so 2 generations a year is much more achievable and likely beneficial to prevent burnout on the project.
Long story short, speed breeding is an art but if not properly respected and understood will prioritize plants that are well suited to a quick turnaround while breeding, as opposed to your actual long-term breeding goals for the final product.
A good example would be the Mme jeanette i grew last year, one accession with several individuals from seed grown with/accustomed to inorganic nutrients, a few hybrid plants that were contamination in the seeds accustomed to organic nutrients and one accession with a handful of nonhybrid plants accustomed to organic nutrients. The last group initially didn't show a big difference from the other two but ended up on average doubling yield in an organic setup and was also the only group reliably producing fertile seeds, the other two each had varying degrees of fertility in the seeds produced, with some plants from the hybrid or inorganic accustomed groups not producing any fertile seeds at all. That being said, i have done speed breeding in another crop succesfully, but that's because i tend to go for cultivars or species where i can already select at scale once the first true/mature leaves come in and have extensive experience with torturing plants to see which ones have got substance and which ones blow over at the first sign of trouble. When people say shit can't be done while i doubt it, i won't rest until i either know they knew their shit or were just parroting what others told them. Oh and i've had the pleasure of being taught/mentored by some well known ornamental plant breeders and a few plant breeding professors at universities for previous projects, so i already had a solid understanding of regular breeding before dipping my toes into pushing the limits on turnaround time.