I don't think I have any algae on my indoor plant pots. I'll have to check on anything outside a bit later. I agree about the thread giving a bit of a headache, though!

I'm not sure what to make of the thread... I will say that I have used many types of fertilizer, usually diluted, and have not really had any problems. I am fond of adding Osmocote to the soil, in small doses, when I repot my plants. And I sprinkle a bit on my outdoor containers that are filled with annuals. Seems to give them a boost.

I have seen that fish is a great food for more than just plants. And so now I'm using the fish emulsion. I do believe this will give me nice results.

I always thought algae grew when conditions were too wet... did not know it was beneficial...

I believe if you have algae around amaryllis, that might not be a good sign. I think algae grows where the conditions are such as it can be continously wet or submerged in water. Amaryllis kind of likes to dry out between waterings. Who can be wise about it? I think if you have algae after watering for a few days, it is fine. If you have it continously though, by virtue, that would not be good for the bulb and the roots. Not the algae itself, but the humidity level it thrives in, right?

soultan...That was exactly what I was thinking of before I searched on it. My amaryllises are all outside, humidity has been in 70-80% with fog every morning lately. I was concerned about this. I almost ordered Physan 20 which was supposed to be a disinfectant, algeacide and fungicide. Somewhere, if I remember right, I read that it can control basal rot.

I never knew that algea was harmless to the plants. It just share with the plant in the nutrition it is getting. Algea in the potting soil would make it longer to dry out. Algea in clay pots would prevent or hinder the transpiration of excess water from the roots. On the other hand, it helps in the prevention of root burn for it takes in excess fertilizer.

So I will stay on the safe side. Scrub the algea off the sides of the pots. And then gently till the soil with algea so that the roots won't "choke".

I cannot control the humidity outside. Nor can I place the amaryllises inside, it's too early.

I was very surprised at how they respond to each other in that forum. So different from here...

I, too, was surprised at how they respond to one another, Maria. Reading all that made me really appreciate what nice people this forum has!

I couldn't find any algae on any of my potted plants, even the ones outside with my annual arrangements. When I spray for pests, I use a 3 in 1 insecticide/fungicide/miticide. Maybe that prevents algae.

I had to spray my outside plants; we had a lot of japanese beetles and aphids earlier this year. Now I see we have a lot of whiteflies. Time to spray again!

Since I believe that algae grows in wet conditions, I don't think it would be beneficial to amaryllis at all! I would be afraid algae would be a sign that the bulbs possibly were rotting...

So good that it is completely dry here, so I don't have to worry about algae... Instead, I have to increase watering...