- You Will Get 50 Seeds Of Dahlia Cactus Mix Flower Seeds. - This is for 50 Dahlia seeds cactus mix they are a great flower for the summer and are easy to grow from seeds. - This is a very nice mix of colors they get tall 35" to 50" tall. - These have large blooms on them we have also planted these in 2 gallon pots at our nursery and they do well. - They would be a good addition around your house.