Leaf fenestration is a normal part of your plant's morphology, and will occur as the plant passes out of the juvenile phase of growth. Since plant's age ontogenetically as opposed to chronologically (as in animals [including humans]) no one can tell you how long you'll need to wait because growth rate must be factored into the equation. If you think in terms of cell divisions or how many cell divisions came before a cell came into existence, and consider that the most recent cells produced by a plant are ontogenetically the oldest, you can see why growth rate is a factor. I have a hawthorn bonsai that I collected from the wild about 20 years ago, and it was about 8-10 years old when I collected it. Because it's from seed, it hasn't bloomed and cannot bloom until it has passed from juvenile to the sexually mature phase. If it was from a cutting taken from sexually mature wood, it would have bloomed long ago (a year or two after it struck) because propagules retain the ontogenetic age of the branch from which they were taken.

Put yourself on plant time and resolve to be patient. Keep the plant fed and healthy and before long your leaves will look like Swiss cheese.

Al

Hello Tapla, I just joined Houzz, and, thanks to you, am an avid user of the Gritty Mix. I hope it is OK to ask my question here, since I am not experienced with using this forum, and would like to seek your advice directly. I would like to transition to a soil less mix in a semi hydroponic system outdoors. I am in zone 10b, humid, rainy during the summer. I need to repot a broad range of plants - Ming Arelia, succulents, adeniums, Bleeding Heart, roses, gardenias, bougainvillea, etc. The mix I would like to create would consist of Viastone, Turface, and zeolite (Sweet PDZ Stall Refresher, the zeolite source available locally) in a 5-2-1 ratio, respectively. I think Professional Hydroponic Growth Medium by Hummert International may be based on the same formula. I plan to use the media with a SWC for each plant (so that they don't drown in the rain). What are your thoughts on my experiment? Thanks in advance for any advice you can offer.

Pentacles

Luis looks big enough to start growing the split patterned leaves. It will probably happen sometime this year. You could give Luis a bigger pot and that might make him start behaving like a grown up. Your cache pot seems big enough to accommodate a bigger grow pot.