All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
There is no harm on you, dear sister, to have the desire that your husband would help you to obey Allaah, and be compatible, in his appearance, with the Sunnah of the Prophet, sallallaahu ‘alayhi wa sallam. On the contrary, you will be rewarded for that, Allaah willing.
Undoubtedly, to shave the beard is against the guidance of the Prophet, sallallaahu ‘alayhi wa sallam, and is impermissible according to the opinion of the majority of scholars, in light of the authentic explicit Ahaadeeth in this respect which command men to let the beard grow. Ibn Hazm conveyed the consensus that cutting short the mustache and letting the beard grow is obligatory, and attested his argument with a number of Ahaadeeth in this regard.
In his book “Sharh Al-‘Umdah”, Ibn Taymiyyah said: “That a man shaves it (his beard) is like a woman shaving her head, and even worse than that, because it belongs to the forbidden Muthlah (i.e. alteration of Allaah’s creation), and so it is not permissible.”
He also said in “Al-Fataawa Al-Kubra”: “It is prohibited to shave the beard…”
So, it is due on you, dear sister, to advise your husband kindly and wisely, and choose the time which is the most suitable for that.
As regards your husband’s caring for his good appearance, then there is no harm on him to do so, as long as he, thereby, does not imitate the polytheists or the dissolute people. The Prophet, sallallaahu ‘alayhi wa sallam, was asked about the fact that the man may like his dress and shoes to be nice, thereupon he said: “Verily, Allaah is beautiful, and likes beauty.” [Muslim]
Nevertheless, your husband should be moderate in his care for that. Indeed, it is an act of exaggeration, as we see, that he changes his clothes thrice daily. It is part of Sunnah to follow a moderate course in clothing, as being humble in it is part of faith. In confirmation of that, the Prophet, sallallaahu ‘alayhi wa sallam, said: “Simplicity (in dress) is part of faith.” [Ahmad, Abu Daawood and Ibn Maajah] According to scholars: He meant being modest in clothing and avoiding boasting of it. For more benefit, please refer to Fatwa 123187.
Allaah Knows best.