If your roses have taken on a stunted look as if they have been burnt or sprayed, they may be infested with chilli thrip. It has expanded rapidly over the last decade. This pest has caused significant economic damage across the world and has a broad host range of plants. Roses being one of their favourites. In severe cases the new growth is stunted and damaged to the point of die back and flowers are malformed looking remarkably like severe sunburn. If it hasn’t hit your neighbourhood rose bushes yet prevention is better than cure. Regular applications of Seasol around the root system and over the foliage will thicken the cell walls and strengthen the plant. It’s important to apply regular applications when plants are in their fast growth phases – autumn and spring.