Orchid Flower Turning Brown. The picture below is a Phalaenopsis spike dying back after blooming it is brown half way down the shoot. The leaf tips turning brown first and then drying out could be because the roots have stopped functioning ie.
A pretty common problem is cymbidium orchid leaves falling off after turning brown or yellow. The spike will lose all the flowers and starts to wither as it has done its job. Apply an orchid fungicide to affected areas and decrease both water and humidity levels while plant is recovering.
Orchid flowers turning brown.
Orchid spike is usually green in color and non-glossy. This will encourage the plant to produce an entirely new flower spike. What makes an orchid plants leaves turn brown dry. The first sign of too much light is often yellow foliage.