Planting nasturium and marigold under tomato and peppers

If I want to plant marigold and dwarf nasturtium under my tomato's and peppers will I need to increase distance or should they be fine since the marigold and dwarf nasturtium are low growing.

I was planning on  spacing my tomatoes and peppers 24" in all directions and then place either a marigold or dwarf nasturtium in the center of each (x) if you will, the center of 4 tomatoes or peppers.

Thanks

I have never planted nasturtium though I do plant French marigolds to help keep pests away.

I haven't placed them in between the plants, just in the corners and across the front and back.  I don't worry about spacing.

I also like Sweet Alyssum though it gets a little too tall.  It smells wonderful.

I have not had issue interplanting marigolds after I have had tomatoes spaced out and establishing.

I would not be too worried of space based pressure between them personally, just make sure that you are feeding them appropriately.

I have been using marigold in the garden my entire life since I was a child. I just randomly put them on the edges of the bed. Never had anything but good come from this. That spacing is plenty imo but I would keep them towards the edge to help prevent getting covered by unruly tomatoes

Hi Allen. I no longer farm but for the past couple decades I have grown all of them together.
Actually, all of my gardens were large tree guilds.
The only problem that I can see with nasturtiums is the potential size. Even when growing a small variety they can get large and bushy in great soil. That may cause airflow problems if they are too close to your other plants. I would think this would be especially true since peppers plants grow so slowly.
I combated this problem by simply eating the nasturtium plants that encroached too close to my fruiting vegetables.

Lots of great info here, thanks everyone

Maybe because we have hot dry summers, but I cram veggies herbs and flowers into every available space, and everything grows great.  In addition to marigolds and nasturtiums, I also plant zinnias, bachelor buttons, Calendula, alyssum, lavender, geranium, petunias and borage.  Not only is it beautiful in a wild unkept sort of way, I always have lots of pollinators, and rarely have pest problems. My only requirement for flowers in the veggie garden is it has to be eatable.
Even though this is the flower forum I want to mention basil is a super companion for tomatoes and peppers.
Good luck.