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Stability and delivery are major challenges associated with exogenous double‐stranded RNA (dsRNA) application into plants. We report the encapsulation and delivery of dsRNA in cationic poly‐aspartic acid‐derived polymer (CPP6) into plant cells. CPP6 stabilizes the dsRNAs during long exposure at varied temperatures and pH, and protects against RNase A degradation. CPP6 helps dsRNA uptake through roots...