What time do you put the phal outside? Are the leaves getting burned? Phals don't like too much intense light.

Sarah

I put it outside whole day in my north or my house under a big maple tree, all leaves looks really good since yesterday.

I 'll upload some pictures tomorrow, thank you for your reply.

black leaf
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new leaf
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roots
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When you said black leaf, I expected something much darker. To me, that just looks like an older leaf that will be shedded. Phals lose leaves time to time as they grow new leaves.

Sarah

laopi,

I know you put it on the north side of the house under a maple tree, but it looks like the leaf received too much sun and got too hot. Also, the leaf on the right appears to have a little sun damage at its highest point. Notice that the older leaf under the blackened leaf is OK. If it were a natural process, the older leaf would likely go first. The surfaces on the newest leaf are pitched at angles, so they don't get as much sun/heat. Phals really do not like direct sun at all. Is there a chance that the phal gets some direct light in the morning or afternoon? Was it much warmer than usual on the day the leaf was burned? My guess is that the newest leaves will adapt to this level of light and the one on the right will eventually show more damage. The black one will fall off and the one underneath will then get burned.

Mike

I agree with Mike. The darkened leaf looks like a bit of too much sun, but all in all your plant looks healthy. You were wise to dry the leaves after the storm, as phalaenopsis don't like water in the crown, they can die very quickly. If any water gets in the crown mop it up with the corner of a paper towel or tissue. Nice growing.

That leaf looks a little scorched. If it gets (even a small hint) any watery looking spots, or gets soft/mushy I would remove that leaf back to healthy tissue and seal the cut edge with cinnamon (don't get cinnamon on roots!!). That damage looks VERY close to the crown and sometimes fungal/bacterial infection can get into sun damaged areas. Should an infection set in and get into the crown, that's BAD! Watch it closely for the next few days!!!
Good Luck...
Pat....