my cymbidium NOID

[oscar freak]

i bought 3 of these cyms that were going for next to nothing,2 are in flower and 1 is not.the plants seem a little battered but are carrying on with the 1st buds beginning to open.they are in a potting medium which looks like top soil and bark pieces,i plan on changing that when they are finished flowering so will have to do for now.they are in a greenhouse with watering/fertilising weakly weekly,as well as morning misting with the same mix.i found a couple of snails about the pot when i first got them which i promptly got rid of.i'd like to get the plants to a healthy lusch state is there anything i should be doing or not doing to get them there.was reading about calcium deficiency in orchids so now iv got something else to worry about,should i add some epsom salts to my mix etc.i dont see any other pests on the plants so im hoping it was just mechanical damage.enclosed are some bad pics will try to upload some better ones soon.

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