If you water your Phalaenopsis orchids with distilled, rain, or reverse osmosis water, then it’s a must to add fertilizer when watering! (Because those waters are so pure they lack important minerals)
If you’re watering with tap water, however, then it’s not a must to add fertilizer – it’s up to you. But it can always give a boost to your plants!
Below, you can find a few examples of different orchid fertilizers you can use.
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Succinic acid pill
Schultz Water Soluble Orchid Food
Espoma Company ORPF8 Organic Orchid Plant Food
Miracle-Gro Ready-To-Use Orchid Plant Food Mist
Miracle-Gro Water Soluble Orchid Food
Better-Gro Controlled Release Orchid/House Plant Food
Grow More 5121 All-Purpose Premium Orchid Fertilizer