There is no one answer for that. small plants in newly amended soil that already contains a nice amount and balance of nutrients may not need fertilizer for some time. Woodland plants planted into a woodland may never need supplemental fertilizer. A fast growing annual, planted in a small pot outside may need frequent fertilizing. Plants in very organic soil will probably need to be fertilized less often than same plants in same conditions in Al's gritty mix. What type of plant? What conditions? What fertilizer?......

Ficus lyrata (10 inch pot)

Monstera deliciosa ( 12 inch pot)

Diffenbachia (13in pot)

Draceana masseageana (12 inch pot)

Coleus (6in pot)

Begonia( 4in pot)

Polka dot plant (6in pot)

All in 5-1-1 mix in the front yard , eastern, no obstructions

I'm in the Texas Panhandle BTW.

Oh and I use regular miracle grow fertilizer

So these are house (containerized) plants that you've moved outside for the season.

I don't move my houseplants outside, either. But I do have lots of seasonal pots of herbs and annuals. They are not fertilized with every watering......which will be every day or more by mid summer! That's not good.

None of my houseplants are fertilized each time I water.

Sara, no the diffenbachia with the marble queen is indoors. The diffenbachia outdoors is too big for my house but i wanted it so outside it is !!!This is my first year putting plants outdoors and I'm hoping it goes well!!!

Rhizo, I figured everyday would be way too much ha ha. Maybe I'll try weekly. I do fertelize my indoor plants "weakly weekly".

I've pretty much moved almost all of my plants outdoors. There are a few still lingering inside (thanks in part to my "procrastinator-itis"). With the warmer weather and the increase in sunlight, plants tend to grow much faster. That being said, I don't always fertilize that often. Just whenever I remember to. And when I do get around to doing it, I still stick with the notion of "weakly, weekly." Even if it's not on a weekly basis, I still use a diluted down dose of fertilizers. Anything more will just further contribute to excess mineral buildup in the soil. We just got to remember, less is more.

I always use diluted no matter how often I fertilize. I fertilized my outdoor plants a few days ago so I guess I'll just see how they respond. With the water hose right outside its very easy to forget to fertilize anyway LOL