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Seedling sizes

11 years ago

I recall this being asked several times now so I'm posting some photos of some of mine just to give you guys an idea of how varied they can be even when they are all getting the same care in cultivation.

Note that I have only ever sown adeniums in winter since I prefer that they have a headstart before the summer growth season. So they start out in my grow box, under grow lights, over a heat mat. My first batch, sown in January and February 2013, are all A, obesum, except for 3 surviving A. arabicum. I am comparing them here with the batch I sowed in February this year.

The seedlings below are my first ever grown from seeds. In this picture they were 1 year old.

Below are two of the same 2013 seedlings, grown hard and regularly
pruned to keep them compact. I do this because I am less interested in
blooms and more concerned with keeping them the shape I prefer. Neither
of these plants have been raised, they have full and growing caudices
under the soil.

Note the difference in the size of the trunk of these two above. Same variety, same care.

Above photo: The seedling the left is a 2-month old A. arabicum seedling (thanks Rick!). Notice how, even this young, it is already developing branches. The one on the right is 2 years old with a long history (it germinated in the dark and was not discovered until 3 months later when I was throwing the soil out into the compost pit.)

The largest seedling I have from my 2015 batch is about 4 inches tall as you can see below. They are still on the heated mat and under lights but I do not think they are getting enough (note the distances between the leaves, or the internodes). I'll be pruning these kids in a bit but this is a matter of preference; I do not like gangly plants. Pruning will force them to branch and develop a canopy with more character.

Having said that, I've also had one seedling that refused to branch out no matter how often I pruned it. I finally decided to put the thing in the ground to see if it does better and it did! Then we moved and I forgot to dig it out.

There are several ways to make adenium seedlings grow FASTER! LARGER! Other than moving to the tropics, (preferably next door to my sister whose 1 year old seedlings are a foot tall, blooming and with roots bursting out of their pots) you can heat them up to 30C, put them under 6500k lights, at no less than 100k lux (leaf surface) for 14 hours, fertilize weakly weekly and, hey, blast them with RATM playing on a loop.

May you have interesting times.

Pagan

Bonus unrelated photo


Comments (12)

  • 11 years ago

    Thanks for this great information Pagan. Sorry to keep hounding you with questions..tell me to bug off when you get tired of me.

    How do you prune these tall gangly ones? Do you simply pluck off the leaves? Or remove every other leaf? Cut the leaves in half? I would like to sample this pruning on some of my gangly seedlings. Can you provide some details on how you would prune a tall skinny DR?

    Cheers, Tracy

  • 11 years ago

    Nah, not a problem, Tracy. Remember, I was taught here in this forum too. Your turn will come!

    Anyway, I just slice them off diagonally with a sharp box cutter, like so:

    I prefer cutting diagonally because it doesn't look as abrupt. Also, the angle helps prevent water beading on the surface. I just took about two inches off of the one above. This might not be the last cut though. It might start looking annoying in the days to come and I will probably slice another inch off. I just leave the rest of the leaves on. They will die on their own as the plant grows older. I sometimes sprinkle a bit of ceylon cinnamon on the cut--it's a gentle fungicide that will help prevent rot. On older branches of older plants, I let the cut dry then seal it with a bead of wood glue.

    This one below, I just sliced the new growth since it was not as stretched.

    Not all adenium growers are as drastic and ruthless, however. Also, every time you prune, you set the plant back. I just really prefer to keep mine compact so I don't mind that part. I also don't want them wasting energy growing rapidly in one direction and then falling over when they bloom because they can not support the weight. Finally, I've decided not to care if they do not bloom while I am in the process of manipulating their basic shape.

    Oh! Wear gloves. A lot of people are sensitive to the sap.

    Pagan

  • 11 years ago

    My goodness, this is extreme! Judging by the bunch you have shown us you must know what you are doing. Here comes a barrage of questions... So can you tell us what the plant's response is after you prune? Does it die a little or respond in any physical manner in the days following the cut? Do you stop watering for a period of time or proceed with watering and/or fertilization as usual? Remove it from bright light? When the regeneration begins does the cut then produce a new tip or does it divide into two branches? Are the leaves bigger when they grow back?


    I am thinking that after spring when my grow rack has some room I might grow some plain pinks to begin experimenting on. Knowing that I may part with them from the very beginning may help make it easier to give them the whack.


    Thank you again.


    Tracy

  • 11 years ago

    So can you tell us what the plant's response is after you prune?

    After cutting, the first response of the plant is to ooze sap. This will dry out and the surface of the cut will become somewhat woody. Then bumps will form the beginnings of a new branch or branches. If you do it in the spring, it will just keep growing and develop a new canopy very quickly if it is hot and sunny--three weeks to a month. It depends on how hot it is.

    Do you stop watering for a period of time or proceed with watering and/or fertilization as usual? I keep watering and feeding as usual.

    Remove it from bright light? Nope.

    When the regeneration begins does the cut then produce a new tip or does
    it divide into two branches? Are the leaves bigger when they grow back?
    The cut just scabs over.Branching, on the other hand, is largelya crap shoot. As I said above, sometimes they form multiple branches around the tip of the cut, sometimes a pruned branch will form only one.

    Note that this plant is now producing 3 new branches after it was pruned last December.

    Are the leaves bigger when they grow back? Not necessarily. That will depend on the care it will receive after pruning as well as the genetic predisposition of that particular plant. If you are already giving it optimal care, it will just keep producing the same kinds of leaves as before. If the plant started out problematic, improving your care will then allow it to produce the best kind of leaves it is capable of producing under ideal conditions.

    Winter has ended!

    Pagan

    Additional info

  • 11 years ago

    I do much the same as Pagan. As Pagan mentions, there is a lull or slowing down of growth afterwards.

    I treat mine the same as always, depending on the rate of growth at the time of pinching/pruning.

    They get watered, fertilized at what ever rate they allow. After the pruning I let the plant let me know when it needs water based on it's uptake.

    When you have a large number of seedlings, it makes it a little easier to play around and experiment.

    I always seem to have way too many and so I pinch early on with quite a few.

    My last Rinoa batch of seedlings are all pinched back now.

    Rick

  • 11 years ago
    last modified: 11 years ago

    Thanks this is extremely helpful. I really am learning so much about Adenium in this forum. Thinking about how many plants I killed before I found you all..still killing them but at a much lower ratio. Going to check out Pagan's additional info now. Rick keep us posted on your Rinoa batch.

    Tracy

  • 11 years ago

    Pagan,

    I miss my cat. Can I have yours? What is his/her name?

    -bong

  • 11 years ago
    last modified: 11 years ago

    That's Hodor. It took us about a year to find a name that will stick. He's extremely skittish with strangers but dangles like a stole if he knows you.

    My other cat, inspecting spring.

  • 11 years ago

    Sigh!

  • 11 years ago

    Marie, tell that to the plant he's suffocating lol I don't even know what that is, the MIL planted it last autumn. Oh! And I have to show you my confusing success with grafting this winter (I know, I should've waited).

    Bong, you clearly need another cat.

    Pagan


  • 11 years ago
    last modified: 11 years ago

    Not really--I was trying to be complimentary about your picture of your cat. I am very happy with my Chihuahua, who does not care for cats.