Vanilla planifolia needs frequent watering since it hails from moist, tropical parts of Mexico. Keep in mind that it as aerial roots and focus watering and nutrition on them. This is not a terrestrial orchid and that is important to think about when you think about vanilla orchid care.
When it comes to nutrients, vanilla orchids will appreciate urea-free fertilizer. The 20-10-20 variety is known to work well. Feed weak solutions and frequently instead of suddenly surprising it with a highly concentrated solution.
As mentioned above, Vanilla planifolia hails from the tropics and will appreciate a day temperature of 27-32º C (80-90º F). This can of course be hard to achieve in a normal home, but try to at least keep it in the upper part of your tolerable range. During the night, the temperature should ideally be decreased down to 15.5-21º C (60-70º F).
