How To Plant Geraniums In Pots Four Generations One Roof In Texas, the best time to plant bluebonnet seeds is in the falltypically between late August and early November. This timing allows the seeds to establish roots during the cooler months, ensuring Aglaonema Chocolate, 5 pot Green Millennium Miracle Gro Potting Soil Mix 50 qt. For Container Plants, Flowers, Vegetables, Shrubs, Feeds up to 6 Months 72790430