Frank Brines Special to Valley News Location, Location, Location. Depending on your location – or more specifically that of your garden – you may have experienced frost damage to your roses and tender young plants recently. Even gardens in the same general vicinity may have different effects due to their prevailing microclimates. Lately the temperatures have risen in the Temecula Valley which encourages roses to jump into life. They enjoy this weather. A regular schedule for irrigating should already have begun. Roses do love food and water for the best blooms. If your roses experienced fungal diseases last year and you haven’t yet done so, you might think of applying a lime sulfur dormant spray soon. You can mix horticultural oil with the dormant spray for better adherence.