I just received these plants this morning in the mail, 3 Amazon Swords and 3 Jungle Vallisneria. Two of the Swords are in decent shape and the other sword can probably be saved but my question is about the 3 Jungle Vallisneria will they regrow or should I not put them into the tank and throw them away? Thanks in advance for your help, I am a novice at plants so if this question is inane please excuse me.