Growing Paw Paws from seed: 2024
Some of y'all may recall last year I made a Plant Profile post after finding my first Paw Paw (they don't really grow this far north in NJ so this was exciting). Well after eating the fruit I decided to see if I could propagate the seeds and I was very successful!
Below I'll describe my process and some tips, this was unconventional towards how I usually grow saplings but I was in my final year of a masters program, needed to be as cheap as possible, and this is probably easier for those of you in apartments
So you want to propagate paw paws? It's not hard it just requires a bit of understanding.
When I found my first Paw Paw I was on the University of Pennsylvania campus, I saw a tree in front of a multi-faith church and immediately recognized the fruit. My friends and I climbed up the branches to get some bigger fruits and then we basically ate them on a nearby bench.
Once I had the seeds (I started with 14, only 4 viable) I walked home and washed off any debris then I wrapped the seeds in a damp paper towel (wring out excess water) and placed them in a plastic bag in the fridge for 3ish months
Around February I decided to grow them, I had some extra cardboard pots I was starting oaks in (image 3: ps I hate these pots) and knew I could use this to to start the seeds, at the same time I asked a friend to grow paw paws so we had a diverse gene pool to produce fruit. Paw paws need deep pots because they develop a taproot that can easily reach 12" the first year, instead of buying multiple deep pots you can place disposable pots in a bigger container with soil. If you find like long/narrow containers those are your best option.
I used left over peatmoss (but loamy potting soil will be better) and placed them 1" deep each. I then cut off the bottoms of my small cardboard containers and placed those together in a deeper pot I had (image 4). You want to retain moisture, so also cover the pots in plastic wrap. Of course water enough to keep the soil moist that goes without saying.
Paw paws take about a month to germinate above the soil but still need the increased light levels. Keep an LED light on above it (these are very cheap to operate) They will start growing a taproot soon after you plant them and occasionally will break the surface, just try to keep it covered in dirt.
Once they appear above the surface (this was march-april for me), let them grow till they develop like 4-5 leaves before planting out. I kept them in my Frankenstein pots until about June when I had time to exchange with my friend (he grew like 18 with seeds from an online seller but stunted their taproots a bit).
Paw paws have a natural insecticide in their leaves, I didn't encounter any herbivory from both deer and insects but I left my best specimens in a sapling cage. I planted about 8 in my yard, all around 4 inches tall (image 5), in partial shade conditions. When you plant the sapling dig a little deeper than the taproot and leave soil around the taproot itself, it helps to have a deep trowel. For amendments, I mixed in richer compost soil with the native soil, but for a few I gave no amendment (I wanted to test if it made a big difference). Ultimately those which grew the most were in brighter conditions but they all did okay, my largest ended up being 15" (image 6) which is the same development as some nursery stock I've encountered for $165...
On a side note you're not supposed to move them once planted but I ended up having to do this with one. I did break the taproot in half, however this sapling still survived so these trees are a bit hardier than others have implied.
So, is this the best way to grow paw paws? No absolutely not. Is it cheap and basically using just garbage...yes! Try to grow your own :)