New leaf growth is caused by the cold soil causing the leaf to curl and fall off producing a new leaf. The cause of the leaf to curl can be from an aphid species or different plant diseases.
Sunlight causes this.
Stink bugs
The moon.
Because whatever you Are using to heat this up however Causes the peperonis to curl up and get small very easy.
It causes the Bourdon tube to straighten.
most likely aphids, though there may be many reasons
A general answer ( since you did not specify what plant ) is insect damage, drought, or soil is too alkaline.
Since morning glory vines are so prolific, it seems they are decided to seize the place, because they are winding their tendrils up through and around the favorite shrubs and trees.
The homophone for "curl" is "kurl."
we curl the leaves and thats the curl
You can use un-, for uncurl.
buy the s curl product (lusters comb thru curl)