Weeping Cypress Turning Brown . Prune out infected areas and plant canker resistant varieties. Browning is often caused by an inability of the pine tree to uptake enough water to keep its needles alive. Taxodium Weeping Cascade Falls Hess Landscape Nursery Finleyville from www.hesslandscapenursery.com If the branch tips and twigs are brown or dead, the culprit could be weevils. Chlorosis may be caused by lack of iron or other nutrients in the soil, injury, stress or improper watering. What fertilizer should i use?