The leaves are turning yellow on the edges and the plant does not look healthy

Yellowing leaves and browned tips, although I am not an expert, seem often to indicate over watering but it is reckoned impossible to over water a spider plant due to the origins of the plant which is a sort of a tropical grass used to warm humid conditions of indirect light..
Perhaps it is being under-watered or positioned in direct light. Water it well each time but allow the soil to dry out between waterings and feed occasionally in the growing season. Misting the leaves might help...

Never pour water over plants when it is very hot it causes leaf problems as you mentioned , use it on the soil, have you fed the tomatoes because they need food as we do, the leaves showing wilt is responding to direct sun a bit of shade may help.

hi Yvonneduchen.
Blooming mandevillas need moist soil that drains well enough to prevent standing water. Too much water can choke the roots so they don't feed the plant adequately. This can cause the leaves to turn yellow. Conversely, too little water can be deadly, starting with yellow leaves that turn brown and drop off the plant.
or try this link.
Yellow Leaves On Mandevilla Reasons For Yellow Mandevilla Leaves
or this one.
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try these links for help

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try these links for help with the iris

Irises


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try these links for information

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Gerbera Daisy Plant Care Gerbera org


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Over watered im affraid