SO Gardening Nov 10

SO Gardening Nov 10

Sunday, November 10, 2019

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Dear Orchid Doc:

How much humidity do orchids need?

Orchid lover

Dear Orchid lover:

Phalaenopsis orchids enjoy 50% humidity. If your home is dry because of winter heat or summer air conditioning, place a small humidifier near, or a humidity/pebble tray under your plants to maintain optimum humidity. Grouping plants together will also help maintain humidity around them.

Dear Orchid Doc:

Why do the leaves of my bare-root orchids drop so easily and fail to grow roots yet might be spiking or blooming?


Dear Mikayla:

Positioning your orchids upright rather than laying them flat might help to solve this issue.

Plus, the failure to grow roots is a direct result of the plant directing all its energy to the blooming aspect of the orchids. My advice is to abort the bloom if the orchid has no roots and redirect the energy to the roots.

Dear Orchid Doc:

My Cattleya is in bloom. Do I still need to fertilise it?


Dear Andrew:

Yes. In fact, it needs the fertiliser now, more than ever. However, your plants will need to be fertilised with a product appropriate to the medium in which they are being grown. A balanced fertiliser will generally do, but one high in nitrogen is preferred for plants in a bark-based mix.

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