It does, but it can also mean "those" or "the". Especially since the verb isn't the ty form, "jsi", "you" doesn't fit the sentence, so it has to be one of the others.
Without "ty" this is saying "old trees are different" and with "ty" it is talking about a specific set of trees (even though "the" is not used like that in English), "those trees". Is that correct?
stari muzi (can't do the accents on my keyboard but accent over r) when it modifies masculine animate plural but stare stromy (no accent over the r) when it modifies feminine plural? What is that about?
See the tips and notes about the declination of adjectives and the pairs of hard and soft consonants. The soft í vowel requires a soft or a neutral consonant.