I use 'Grow' from Dyna-Gro (rather than Foliage Pro) on ALL my container plantings, indoor or out, foliage only or flowering/fruiting. And I use it at half strength (1/2 tsp/gal). To be precise, I dose all my containered maples and conifers with Osmocote at the beginning of the season and then supplement with the Grow periodically through the growing season but no more than once a month. And tht is primarily to supply any needed trace minerals, as the Osmocote covers pretty much everything else.

Marcia, This is a part of one of Dr. Mark Dimmitt's articles. There are many of them if you search on Aridlands or other sites. You are going to find many conflicting results in search for "what" fertilizer works for your Adeniums. I am not a scientist and try to understand and take in what I read. Dr. M. Dimmitt is world renown and he has studied and grown/hybridized many cultivars and most of the introductions to US and/ North America. His studies are based on proven and tried and true results along with his co workers and Authors of a Marvelous book. Adenium: Sculptural Elegance, Floral Extravagance. This book is a true inspiration and must have for people growing these. Feeding Adeniums also respond well to regular and generous fertilizing. I use slow-release fertilizer in my potting media and inject my irrigation water during the growing season with a balanced fertilizer such as 20-20-20 plus micronutrients at a concentration of 200 ppm nitrogen. Inadequate watering and feeding are the primary reasons adeniums have been regarded as slow-growing. Generous culture produces literally unbelievable results. (An eight-month-old plant splitting a six-inch pot that I entered in the seedling category at a CSSA show was disqualified by the judges because they didn't believe it was less than the limit of a year old.) Specimens several feet tall and wide in 18-inch containers can be grown in only three to five years (Figs.1, 2) and sometimes even less. Adeniums seem to require high nitrogen for both strong growth and copious flowering. For one year I used a low nitrogen fertilizer (2-10-10) on most of my mature adeniums in an attempt to thicken their stems while minimizing further elongation. Not only did the low-nitrogen plants not thicken appreciably, they also flowered poorly that year. (Well-fed plants flowered normally.) ................................................................................................................................ Talpa, has many articles within the Gardenweb/Houzz site and I would definitely search out his articles using the Search bar at the top of page. Use when in the Adenium Forum and you will find an vast amount of articles. I have always been of the understanding that Adeniums, Do not require high levels of "P" as you will see in many Bloom Booster fertilizers as with Orchids and many summer Annuals. I started using the Dyna Gro 9-3-6 & Dyna Gro 0-0-3 through Information from Laura and I have to say, I am definitely pleased with what I see from using it. Rick

Math Error in First Post added Correction. The TDS in Foliage Pro Solution must be much higher than approximated. Edit: Math Error 1tsp= 4.94 ml 4.94grams at sp=1 1US Gal = 3.785411784 liters (0.18)*(4.94g/4)/3785= 235ppm Error Should be (0.18)*(4.94g/4)/3785= 58.7ppm at conversion factors of 500 ppm/mS or 640 ppm/mS 58.7ppm/500= 117uS or 58.7ppm/640= 91.7uS Too Low to be accurate "Edit: Math Error 1tsp= 4.94 ml 4.94grams at sp=1 1US Gal = 3.785411784 liters (0.18)*(4.94g/4)/3785= 235ppm Should be (0.18)*(4.94g/4)/3785= 58.7ppm at conversion factors of 500 ppm/ms or 640 ppm/ms 58.7ppm/500= 117uS or 58.7ppm/640= 91.7uS Too Low to be accurate "Not sure I'd have been comfortable with the assumptions behind the "total" ppm approximation" You were Correct on that Maybe others that use Foliage Pro can validate the EC readings with other meters. Even at 320 grams/Liter 1/4 tsp/Gal gives only about 105ppm total concentration. This is about 164 uS at 640 factor.

If you are fertilizing biweekly, then follow the label instructions - 2 tsp per gallon. And how much you apply to each plant will depend on how large the containers are - you want to thoroughly water the container with the dilute fert, not just drizzle in a gallon or so of water! Start with as large a container for the diluted fert as you can handle - a 5G bucket or large watering can (figure the volume the can holds first) - and add the fert in an appropriate proportion. I tend to round up slightly so for a 5G bucket, I'd add a scant 1/4 cup of fert. And in a container situation, it is never too soon to fertilize :-)