That's right! I have found a way to propagate pings with about a 110% strike rate, on average. For my P. Agnata, it's more around 150%. (Numbers above 100 indicate several strikes per leaf). This method also works very well on both leaf types in the heterophyllous pings, and also works on cubans. I have not tried it on european/american pings.
Some heterophyllous pings with very small rosettes may not strike very well while dormant. However, large dormancy leaves, as seen with agnata and other pings, are very good. Trial and error helps a lot. Another problem with dormant leaves, is that they take longer to strike, and may rot off. This is partially why I prefer the bag: no problems with rot.
As twitcher pointed out, there are some factors you cannot control when striking pinguicula, but I have found that with increased humidity and temperature, pings produce more strikes.
Here are the steps:
0. Remember to feed and care for your plant prior to leaf pullings. The plant can survive half of the leaves being removed, but that is survive, and we want our plants to thrive. This also helps cuttings to strike faster. If you take pullings in the winter months, leaf pulling success rates are *slightly* higher, however, in the summer it is effectively the same because the larger leaves produce more than one plantlet. Pull whenever you like, really. Dying leaves sometimes strike, so I don't want those to go to waste.
1. Rip leaves off the plant. Gently tease downward until the leaf pops off, sometimes there will be an audible noise. If you don't catch the 'white part' of the rhizome, don't throw it away. For P. Gigantea, sometimes I have observed plantlets growing on the edge of the leaf. I didn't learn this until later: The larger the leaf, the larger the baby will be. Keep this in mind.
2. Place the pinguicula leaves into a plastic bag. Slightly blow to inflate. I either put a spritz of water into the bag, or a wet cotton bud, to keep humidity high.
3. After the leaves pop, transfer them to a 100% humidity deli cup or something of the like. I use those containers you can get chocolate almonds, flour, or bulk products in from whole foods. They're great, stackable, and all transparent. Fill this container with the following mix:
1 part chopped sphag : 1 part peat : 1 part perlite : 1 part sand.
Lime, no matter how many people will say otherwise, does not seem to make a difference, and it is expensive.
4. As with TC techniques, these plants have NO waxy cuticle. The best thing to do is acclimate them, however, I have found one can repot them briskly into 50% humidity (that's my house humidity), and give water liberally. If you're in a xeric area, slowly open the lid of the deli cup, taking 1 week to fully do so.
After certain species of pinguicula flower, they divide the rosette into 2 or more. Mostly, the flat-leafed pings do this. I am yet to see any filiform varieties divide after flowering. I'm looking at you, P. Moctezumae .
Carefully unpot the plant and hold one plant in each hand. Make sure that you have all of the leaves from the right plants in your hand. I have done this several times, grasping a part of the other plant, and it will fall off. If this happens, don't worry. You have yourself free leaf pullings.
Gently twist your hands as if you are unscrewing a bottle. The ping should pop off at around 15 degrees of rotation. Pot up the plants, and give 100% humidity to help them recover. Then, slowly acclimate them back to normal humidity.
You now have 2 mature pings.
This method is used for WINTER leaves, the succulent, non-sticky kind. For carnivorous leaves, refer to the plastic-bag method.
1. Carefully unpot the plant. You do not have to feed it prior to this, as winter leaves in heterophyllous species do not eat. Gently stroke the sides of the rosette with your thumb to remove dirt and loosen leaves. Then, gently pull leaves off. You can safely remove leaves until there are 3 rosettes from the crown.
2. Place the leaves upright on a mixture of LFS and Perlite. Do not wet the LFS too much, the leaves are succulent and last for days without water. Place the leaves upright on the material, and seal the container it's in to ensure 100 percent humidity. The leaves should strike within a month.
Pinguicula are designed to be pollinated by hummingbirds, so if you've ever dreamed of pretending to be one, today is your lucky day.
1. Wait till the flower is 2 days old.
2. Insert a fine paintbrush to the back of the flower and rub around until it is coated with pollen. Go to another (or the same) flower, or a flower on another plant (whatever you want to pollinate).
For temperate varieties, just LEAVE IT OUTSIDE unless you want to hybridize. I assure you that bees are better at their job then you are.
3. The seed pod should darken and mature.
Collect seeds and sow them in a peat/sand mixture. Add perlite to aerate the soil, to your desire. Keep in mind this is not the 'forever' pot, so it is ok. Bag the pots and give them heat and sun. Seeds should germinate quickly, within a month or so.
Some species like P. Lusitanica are annuals, and the best way to propagate is by seed. However, with Mexicans and Cubans, leaf pullings are the way to go since they grow much faster.
That's right, I said Gemmae! Some pinguicula, like Pinguicula Grandiflora, produce gemmae along the base of their winter hibernaculum. Unpot the hibernaculum, and remove the gemmae with your fingers or forceps.
Gemmae are magical things. Sow 'em and forget about 'em. Literally. Come back in 2 months, and there will be baby plants.
If you see gemmae and don't pick them, the mother plant will eventually kill them.
Leaf tips or stolon:
Some pings propagate by leaf tip or by stolon.
Leaf tip propagators:
Mexicans: P. Medusianae and P. Heterophylla
Temperates: P. Primuliflora, Pumila, and others.
P. Vulgaris, and a few rare mexican pings like P. Vallisneriifolia.
Google your plant to see what it does. Wikipedia is surprisingly good. Or ask a CP buddy.
If you see a plant on a leaf tip propagator, wait until the leaf touches the ground, and pinch dirt around the baby. It should take root naturally.
If you see a stolon, treat it as a darlingtonia, heliamphora, or sarracenia. Let it grow, and cut it when it gets large.
After you take a cutting and it strikes, there will be no roots. This does not apply to runners or gemmae. American/Temperate pings tend to be easy-to root and will not need encouragement. However, Mexican pings will put roots down fast if you hold off on the water for a few weeks. This encourages a deep root system.
Pics attached are of P. Rotundiflora in a mini container, used for pasta but now for my CP addiction .
I hope one of you tries this out. For now, Good Luck and Happy Growing.
Thanks to Twitcher for adding to this guide! Hopefully we can make a comprehensive guide to striking pings!
I also turned this into a full fledged guide.