I ran across a post that seems to have been copied and pasted at many different forums called Finding My Nutrient Program where a test run was done using 8 different nutrient lines. Have you seen it by chance, homebrewer? Dyna Gro was Test #6. I was a little discouraged by some of what the grower had to say about DG and hoped to hear something from you, hb. I don't know if I am allowed to share any links here so here is what it says:
Test 6 - Dyna Gro = Grow (7-9-5) - Bloom (3-12-6) - Protekt (0-0-3)
This is a simple and effective chemical fertilizer. The manufacturer specializes in multi-cycle indoor flowers, things like violets and orchids. Measuring the ppm of this solution needed only minimal work considering the ingredients are strictly elemental salts. The company basically recommends a 1/2 tsp every watering of either Grow or Bloom. I ultimately decided that was the best application also with minor increases later if 12/12. As with most chemical fertilizers, nutrients are extremely available for plant absorption and fast acting. It's advisable to add a mid flowering (water only) flush mid cycle. This cleans the medium of any salt build up which will occur using these nutes. As with Test 4 I approached this test with no microbiology in mind. I lowered average PH to 5.8 + and treated the medium as more of a " hydro " environment.
As both major solutions contain plenty of nitrogen, potassium, phosphorus and micro-nutrients simply switching from Grow to Bloom upon initiating the 12/12 light cycle is entirely appropriate and effective. These chemicals work but do have some faults. Flavor and scent are absolutely diminished in comparison to more organic methods. I've always found plants grown in chemical conditions take on a less bushy appearance and tend to be taller and woodier in structure. Fewer, more efficient leaves are developed and buds are tighter and more compact. Crystallization was more than sufficient with this product and began early on in flowering.
The stand out product here was Protekt. I continue to add it to early vegetative plants even today. This is a potassium strong silicon solution. Silicon literally makes plants stronger by thickening cell walls within the plant. This helps in fighting unwanted fungal spore penetration and even helps deter plant sucking insects. It produces strong, thick skinned plants resistant to environmental stress. The extra potassium is also helpful, encouraging root development and chlorophyll production. With susceptible plants to pest and disease this addition is recommended. In later flowering this product helped in typical ways, increasing bud size and promoting carbohydrate relocation.
The final product was more generic than any other test and although potent, the dried product was my least favorite. As with many chemical/synthetics Brix levels were very low. Keep in mind this is only in comparison to the other final products involved. It was still quality, high grade marijuana. The ease of application and value here cannot be ignored. If you grow plants chemically, and are looking for simple, effective nutes this program will get good results.