Hannah, Yellowing between the veins of older leaves generally indicates a lack of a transportable nutrient, such as Magnesium. What is the analysis of the Plantacote? It could be that it is too slow releasing for the needs of the A. x calidora. These plants are very vigorous and that means they need enough nutrients to sustain that growth. Otherwise, they will decline and die down or out. I give my host of Alocasia hybrids a soluble fert solution every week and I use a higher nitrogen mix as well, occasionally supplementing with extra iron and manganese. Even under these conditions, some of mine get a little pale from time to time, especially in the summertime growing months. Many, if not most, of these Alocasia like well draining soil mix as well, so if your soil is heavy and wet, that might be part of the problem. Healthy roots are a must for proper nutrient uptake. Hope this helps, LariAnn Garner Aroidia Research Here is a link that might be useful: Alocasia x calidora

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What you have celey, is almost certainly a colocasia, not an alocasia! Both are considered EE, taro is a common name for colocasia that are used for food crops! I'm not at all sure what pest you would have gotten on it indoors, while mites are common on EE, they laugh off insecticide, I think it makes their coat shiny...jk...what did the lil buggers look like? That thing sticking out if the corner of the pot is a runner, a dead giveaway that is a colocasia! There's also a dead dryied up runner there too! Lending credit to marquest's suggestion that it's soil maggots, their advice to get fresh soil in, is sound. Getting too dry could have caused these symptoms also. They look awful big to be soil maggots, but I bet that's what the are! They shouldnt hurt much, but they can chew at the bulb and kill a good one, especially if it's stressed! It's very likely that they are working on it roots, making it impossible for the plant to get enough water up to the leaf, so they burn in the sun, it's also possible that it's just too dry, colocasia can go from moist to dry in no time! Those big leaves need lots of water! These plants thrive on flooding, no daily sips! In an apt. it's easier said than done, but when you repot it, you should hose off ALL the soil...replace it with good potting mix! Water in well and take it easy on the sun and water until its recovered from repotting, keep it evenly moist, but not wet, after a week or 2 you can water daily, and return it to it's spot. It may look like it dies altogether after the repot, fear not, the bulb will make a come back! And that runner will make a new plant too! I see your in z10, overwatering a colocasia there is practically impossible! I grow several if mine fully submerged, they don't mind as long as it's warm out! Alocasia like it drier, again if it's hot, they will take ALOT of water! It will probably be fine even if you can't repot it...but I think you should replace it! They are forgiving plants, thanks to that bulb! I grow most of my EE, 60 varieties, in sun, as long as they aren't too dry, most prefer sun! They love fertilizer too! Time release would probably be best for you. Unlike marquest, I think they make excellent houseplants, alocasia are way better for it than colocasia, and they can attract and foster spider mites, it's true, but the mites are easily treated, just mist with water daily, occasionally wipe the leaves down with your hands or a cloth! Ive never had an issue with anything else on them! I grow in zone6, all my EE come in for the winter, some as houseplants, others I just let go dormant and then pack away the bulb, in zone 10, you can grow them year round! If you'd like to learn more, swing by the aroids section, I may be the most hooked, but there's several EE junkies there...I don't think there's a cooler plant out there! Well maybe voodoo lilies top them...

Mimulus, what soil mix have you tried with the odora? Alocasias are adaptable but don't like 'wet feet' or very dry conditions. Here in central Fla I let the mix dry to an inch or two before watering, but daily rainy spells doesn't seem to bother them. I have mine in a mix of primarily unsifted pine bark mulch (from WalMart), with a little peat moss or styrofoam balls and a little perlite. I've successfully grown them in many other mixes using various proportions of Miracle-Gro, peat moss, pine bark mulch, perlite and/or vermiculite. They're really not too particular as long as the mix has air spaces and drains well. It would help if you turn on your Messaging. My email is bluesea14808@yahoo.com. If your interested in trades, I have quite a few alocasias and colocasias, including A. macrorhizos variegata. Also have a large collection of philodendrons, aglaonemas and other aroids, and sansevierias. Russ