Aglaonemas are not very particular to the soil quality, so any packaged soil is suitable. Make sure though to add some sand into the soil and some pebbles in the bottom of the pot to ensure excellent drainage which is necessary to these plants. Depending on the specific conditions of your home, watering once a week seems to be adequate.
Check the soil before watering and do not let your plant live in soil that is always wet, also do not let it sit in water and always empty any excess water from the tray to avoid root rot. Take care not to let the plant go thirsty because the leaves will wilt and may never recover. You can repot any time of the year avoiding days with extreme heat or extreme cold in order not to stress your plant more than necessary. As far as humidity is concerned, provide as much humidity as possible either by using a humidifier, or with spraying the leaves. You could also use a pebble tray as we have described in various other articles. Do not worry too much though because aglaonemas can adapt to less humidity than most indoor plants. Use any liquid or tablet form fertilizer but use approximately ? of the dosage described on the label to avoid damaging the roots or the tips of its leaves. In very young plants, avoid fertilizing until the plant is around 6 months old, while in mature plants you should fertilize 3 times per year (every 4 months). You can easily propagate aglaonemas from cuttings. Cuttings can be placed in water until they grow roots or they can be planted directly into soil. Aglaonemas can grow in water for a long time, provided that you replace the water often and that you carefully remove any algae from the inside of the container. Same as pothos (devil's ivy), aglaonemas can be grown in small glass vases with water that can be placed on your bathtub or on window-sills, creating small tropical areas in minimum space. As we already mentioned, one of its basic advantages is that it is almost disease- and insect-proof. However, to be on the safe side, keep leaves very clean and check often for aphids, thrips, or spider mites that may have affected other indoor plants. You have plenty of good reasons to buy aglaonemas. They are beautiful, easy to grow, hardy, needs no specific care, it adapts easily, is suitable for low light rooms, with quick growth, even in water, extremely easy to propagate . . . what else could you ask for?