Questions

Griselinia hedging seems to be dying here and all around locality. Stems are a rotting brown colour. The roots seem to be healthy. Is this a disease or frost damage and is there anything we can do to revive the hedge. Varigated variety is completely destroyed

Are tomato plants perenial or annual? I got lots of new plants from those that self seeded but what if I don't take out this year's plants? Can they be treated as perenials. They are in a tunnel.