Monstera (Swiss Cheese Plant) I would repot your plant into a much larger pot useing a fairly rich peaty potting compost, added to it, some pearlite etc, this will help keep air into the soil and help with drainage etc, when potting you should buy a moss pole (Garden Centre)to place into the pot at this time, these plants are top heavy and require the support from the pole, tie the stems, not too tight, to the pole with soft garden string or better still shrub clips (like clothes pegs for plants) the plant also produce aerial roots from the stems and the moss pole helps deliver moisture to them, this helps give it lush vigorous growth, or, when these arial roots are long enough, you can attatch them to the moss pole, or,let them grow down INTO the potting soil,
Cheese plants have very large fleshy roots, usualy white/light brown, they break easy, so tease them out as you spread them into the new soil, any dead root, (brown and soft stringey looking, like empty worms) should be cut away back to healthy roots.
As I live in Scotland, central heating radiators or fumes from boilers etc are a problem, also too much direct sunlight through glass, they need a lot of light but not direct, shade from blinds or drapes will do, indoors, they don't like drafts either.
Keep dust off the leaves and stem by wipeing with a damp cloth, always hold one hand under the leaf to protect it as you wipe, if you wish to use a plant leaf shine, DONT, spray it onto new leaves as it stops them breathing,
Mist your plant 2-3 times a week, they come from tropical rain forrests, Mexico etc, so they dont like a dry atmosphere at all, also mist the moss pole for the aerial roots to get some moisture.
New leaves are always floppy, but they do firm up by themselves as they mature, small imature leaves ( heart shaped) don't have the cuts in them and never will, too many small leaves are a sign that your pland is in too much shade,the larger leaves, which you want, do have the perforations and come rolled up, they unfurl themselves.
If you have brown or dead leaves, normal sign of too dry an atmosphere, too close to a dry heat sorce etc, or over feeding, better to remove them, pull down holding the stem and the leaf and stem will come away, some white sap may drip out, don't panic, just wipe it away.
After you repot, water well and let the water drain away or stand pot in bucket of water till soil feels damp, lift out and drain, dont let your plant sit in excess water as the roots will rot.
Dont feed plant at potting, let it settle into it's new pot for about 10 days, then feed it about every 2 week with a liquid house plant food added to the water, dont over feed or over water, or you will kill the roots, better underfed than over fed. Feed from about spring and stop around September, If it gets cooler, dont water as for summer time, much less needed, restart routine again with food and proper watering in spring.
My Monstera outgrew our home, had it about 15 years and it grew up with my kids, had to be passed onto a larger home, you can just cut the top off if it gets too large, or you can make a new plant by wrapping damp moss around the stem at a small aerial root and leaf axil,( where leaf stem joins the main stem) hold the moss in place with soft string and enclose this in clear cling film or polly bag, tie top and bottom of this moss parcel and in a few months, you will see the new roots, at this stage, cut BELOW the parcel, untie it to expose the roots and pot the new plant up, giving it support, care as for the mother plant.
If you are really worried about watering, buy a large self watering pot, these have an extra reserve space attatched under and as you water, any excess will drop into the reserve, away from the roots, this has a wick that sits inside the actual pot which draws water as required into the soil, if unsure when water is needed, stick finger into the reserve and if empty, you need water, it also helps when you go away on holiday.
Hope all this helps, good luck and relax, you will soon start to enjoy your Monstera or hopefuly, just a MONSTER.
