marigolds, healthy despite the hot weather?

.. Just because P can't control the weather, is no reason to say that it cannot be done. Weather control is really quite easy to do, (once you know how to do it), but that's another answer for another as yet unasked question on another day. To Your Question:: Marigolds will grow well under a variety of conditions, even extreme one's. Burpee is a good brand of seed, old, tried & tested. However,, even in the best of brands, you can still get a 'dud pack' of seeds now & then. (unfortunately there is no way to know, until you plant them & they don't come up. or not bloom in your case.) .. I once bought a pack of carrot seeds, 1,000 seeds in the packet. I planted half the packet & got only 3 dozen carrots 'begin' to grow. Only 1 carrot reached maturity! The other half of the packet, I gave to a good friend on the other side of the state (contrary weather conditions). He planted them immediately & only 1 carrot grew! The brand was T&M (Thompson & Morgan), & yes, I still do buy & use their seeds because they are one of the best around. ... Sometimes you can just get 'unlucky'.

The plants are healthy and not stressed, therefore, they are putting a majority of their energy into growing foliage and don't yet feel the need to reproduce (reproducing results in flower.) On the bright side, when it does bloom you will have much more blooms.

You can force blooms, by stressing the plant by reducing water supply or slightly damaging roots, which sends the plant into reproductive mood. Weather also plays a big role in reproduction, but you can't control the weather. :) If it were I, I would leave them be, keep them healthy as you are doing, and they will flower when they feel ready.

IDK...I grew marigolds last year in 115* desert weather. I got plants and blooms. Then I took the seeds from them and dried them and replanted them -no problem. They did go through a non-bloom stage tho-but re bloomed the nxt yr which was a total surprise for me. How long have they been bloomless ?? Mine went through a non bloom stage for like maybe 3mos.

Just keep treating them like they were blooming and maybe they will surprise you.

sounds like you grew french marigolds and now you have african. these grow much larger and flower later, time will tell as flowers are also twice the size