This is the process to which I referred in last Saturday's post, the one that got me ~91% germination on a batch of gift seeds. (This is the last day to request your own Clivia seeds.) It works a lot better than the process I used on my Clivia seeds in 2013.
You will need: ripe Clivia fruits, a germination container, vermiculite, vinegar, a pot in which to boil water, a bowl, paper towels, a warm but not hot surface on which to set your container.
(EDITED to add photos, 4 May 2017)
1. Get ripe fruit that contains seeds. I'm not actually super clear on how you know when a fruit is ripe, but I figured it out in 2013 so I'm going to assume it's pretty obvious.
2.
Boil some water. (Tap water is fine;
softened tap water is not.) This is mostly for your germination medium, so how
much water you need depends on how many seeds you're starting, but, you know, it's just water, and it's about as easy to boil a lot as it is to boil a little. Once that's done, cover it, set it aside to cool, and hope that it will be cooled down enough to use by the time you get to step 6.
3.
Open the fruit. I just kind of squeeze it until it comes open; this is kind of messy, but not as messy as you'd think, since almost the entire volume of the fruits is dedicated to seeds, so there's very little pulp.
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4. There is a thin membrane or skin covering each of the seeds individually, which will likely tear as you separate the seeds from one another. You need to
remove all of the membrane from the seeds. It's fairly easy to see and feel the difference between covered and uncovered seeds, as the membrane is a little bit fibrous, and thick enough to be visible. It also peels off of about 80% of the seeds really easily, and is impossible to get off of the remaining 20% because the whole thing is kind of wet and slimy and the seed itself is round so there's no easy way to get a tear started. (I had some success with setting down a paper towel on the work surface and rubbing one particular spot on the seed lightly against the paper towel until a hole started.)
This is the most annoying step of the process; it's all downhill from here.
5. Next you'll need to
get a container to start the seeds in, and a growing medium. I used vermiculite for my growing medium, and strongly recommend that you do too.
2 For a container, I used the same clear plastic containers I use for germinating everything else,
but there's a lot of leeway there. Mostly what you need is a container that allows light in, but not air (or at least, not a lot of air -- you don't want the seeds to dry out), and is deep enough to accommodate 1-1.5 inches of vermiculite at the bottom while still leaving a couple inches of room for leaves to grow.
6. You need to
moisten the vermiculite. If your boiled water has cooled off to 90F/32C or below, go ahead and saturate the vermiculite. (90F/32C is a guess; I'm pretty confident it's safe, but that doesn't mean 95F/35C is necessarily
not.) Pour off any excess water, then cover the container.
7.
Rinse the seeds in dilute white vinegar. I was told 2% vinegar, but I didn't actually measure it out when I did it: I just filled a clean large bowl with water, added a couple splashes of the vinegar, and dropped the seeds in.
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8.
Pour the vinegar solution off the seeds, rinse with more of the boiled water and pour that off too, then set the seeds in the vermiculite, eyes down. (The eye is a slightly-raised bump on the seeds; it's easy to locate because it's the only distinguishable feature they have.
4)
9.
Cover/close the container and set it in a location with bottom heat (on top of a refrigerator or hot water heater; maybe on a heat mat specifically for seed germination if you're fancy
5) and wait.
I saw the first leaves and roots begin to appear after about two weeks. They won't necessarily all germinate at once. Some small percentage are likely to be duds, that do nothing at all (about 6% of the total, in my case), and a few others germinate but then just stop developing (about 3%). Since so many
did work, I didn't bother trying to figure out what was wrong with the ones that didn't.
10. Seedlings are ready to
transplant to individual pots of potting soil (about 2-3" diameter) when the roots are about an inch long. Usually you see the surface of the seed shrivel and dull a little, too.
It's fairly obvious where the soil level should be: the plant starts growing out of the side of the seed, with leaves going one direction and the root going another. Plant it so that the root is below the soil and the leaf is above the soil. The seed will usually wind up mostly above the soil.
My source recommends a mixture of orchid bark, perlite, and a little bit of time-release fertilizer like Osmocote, though I didn't follow most of those suggestions
6 and my seedlings seem to be fine.
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11. I set my potted seedlings on a low shelf in the living room (which means strong air movement, cool temperatures, and brief morning sun) but I don't think they're super-picky about location. I do watch them pretty closely to see whether the soil is drying out, and so far have been
watering them about once a week; if we didn't have the ceiling fan going, I could probably get away with less frequent watering.
And that's pretty much it. The tricky part, for me, is getting
Clivias to
bloom: they need cooler temperatures than we have in the house. I may try keeping some of them outside this year so they're properly chilled.
This is not the only process that people have gotten to work; my source reports being able to start them in damp paper towels sometimes, and that some people soak them in water until they germinate though that doesn't seem to work as well. A few people just plant the whole fruit in potting soil without doing anything else, and apparently get seedlings out of that sometimes. My source says that on at least one occasion, she didn't have time to sow the seeds after stripping the membrane off of them, so she put them in the bottom drawer of a refrigerator, in perlite, and forgot about them, and a substantial percentage of those germinated when she checked them later. But I can vouch for the method outlined above, not the others, so it's what I'm recommending.
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