'I am in the pink' and 'I am in the pink of health' are both correct.
Yes, you can plant flowers. It is common to say this. "I planted some flowers in my garden."
"I planted some sleek trees." This does not sound right. One rarely hears trees referred to as being sleek. The grammar is correct but it sounds awkward.
RE: ENGLISH GRAMMAR TEACHERS PLEASE HELP
'I am in the pink' and 'I am in the pink of health' are both correct.Yes, you can plant flowers. It is common to say this. "I planted some flowers in my garden."
"I planted some sleek trees." This does not sound right. One rarely hears trees referred to as being sleek. The grammar is correct but it sounds awkward.