Are you using a grow medium you made yourself or a commercially prepared medium?

If you made your own medium, did you include a source of calcium (Ca), i.e, dolomitic lime?

An adequate supply of Ca must be in the nutrient stream at all times if tissues are to form normally. Even if there is an normally adequate supply of Ca in the grow medium, soggy soil can cause a cultural deficiency of Ca by limiting its uptake. Symptoms of the deficiency often include hooked or distorted leaf tips and localized areas of tissues formed by cells with walls compromised by a lack of Ca. The compromised areas can appear translucent, or, as cell walls fail and leak cell contents into intercellular spaces, a corky tissue similar to that associated with oedema forms and becomes conspicuous. This can occur from an actual deficiency of Ca or from a cultural deficiency (too much water in the medium/ too much phosphorous, zinc, or especially magnesium).

Describe your fertilizing practices, please. What you use (including the NPK %s), how often applied, and at what rate/concentration. The plant looks quite chlorotic.

Al

i would bet on something like this...

https://gardeniaorganic.com/plants-with-holes-leaves/

before i would question a nutrient issue so bad that the plant cant produce a proper leaf...

we must start with an Id ... im sure someone will chime in with the name.. or you can try the name that plant forum ...

but the yellowish coloration is surely a nutrient or lack of light issue as Al suggests ... even if the holes arent. ..

ken

Hi Ken,

Im afraid im not confusing fenestration for the clear patches in the leaf. The plant is an Adansonii. Thanks for the input though.

Tapla, ill get some info for you shortly.

The confusing thing is that one group is growing in an aquarium with no substrate appart from claclay balls, one is in regular monstera soil and the other is in monstera soil but growing on a moss pole all have the same condition.

Actually, identifying leafy houseplants isn't really as important as most think, except perhaps as a point of curiosity. The reasons are four. First, most leafy houseplants want nearly exactly the same things; i.e., bright light; then, a well aerated medium that doesn't hold a lot of excess (perched water); appropriate levels and ratios of supplemental nutrition, and a grower who uses appropriate watering practices. The four points mentioned will cover at least 95% of leafy houseplants. Of course, there might be an outlier here and there who wants direct sun or filtered light, or something other than a 3:1:2 ratio fertilizer like Foliage-Pro 9-3-6; but for the most part, getting the four most critical points right will normally allow growers to maintain their houseplants at a high level of vitality until root congestion starts to take a toll. Dealing with root congestion should also be recognized as an essential part of every grower's care regimen if their goal is to provide plants the best opportunity to maximize realization of their genetic potential in terms of growth rate, vitality (health), the ability to resist insect/disease pathogens, and eye appeal.

@kitkay I'll watch for your info.

Fwiw the full name of the plant is Monstera adansonii (lower case a) rather than just Adansonii.