Answer
(Fatwa: 1648/1355=L/1429)
According to the Quran, the heaven, the earth and every thing between them glorify Allah. The trees and plants too do so. This glorification is common; there is no specification of time. The Holy Quran says about the prophet Dawood (عليه السلام):
إنا سخرنا الجبال معه يسبحن بالعشي والإشراق
We had subjugated the mountains to join him (in) making tasbiH (i.e. pronouncing Allah’s purity) at evening and sunrise.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband