I've had *no* success growing tomoatoes in Phoenix in the summer. Sorry I'm not much help. :-(

Tomatoes are not hard if you remember a couple of things! On February 15 I plant my tomatoes I like to use the cages it keeps them off the ground. I add a lot of compost and manure to the ground and till it in well a couple of weeks before I plant. Variety is key, my favorite tomatoe is the Early Girls, Cherry Tomatoes do well here as well. Early Girls are a smaller tomatoe but they produce a lot of sweet fruit. Out of six plants I have canned and had plenty to eat and give to friends! If the temperatures are cool it may seem like they are just sitting there but they are growng roots and by March they will really take off, April 1 I feed them to give them a boost and by now I can usually find a few tiny tomatoes and flowering is in full swing. It is important to keep the water steady not to wet or dry periods or you end up with problems. By May you should be picking your first tomatoes and in June you will be busy by the middle of July they start to slow down The high temperatures stop/slow flowering. Always leave as much foliage on your plants and if the top fruit are exposed they will burn in June so I would advise a shade cloth I use the cages as support and attatch with clothspins. With the winds we have it is a good idea to make sure you take the extra time to really get your cages secure in the ground! They will blow over! By the beginning of August your tomatoes will be done! Good luck, Sunsprite

Tomatoes are not hard if you remember a couple of things! On February 15 I plant my tomatoes I like to use the cages it keeps them off the ground. I add a lot of compost and manure to the ground and till it in well a couple of weeks before I plant. Variety is key, my favorite tomato are the Early Girls, Cherry Tomatoes do well here as well. Early Girls are a smaller tomato but they produce a lot of sweet fruit. Out of six plants I have canned and had plenty to eat and give to friends! If the temperatures are cool it may seem like they are just sitting there but they are growng roots and by March they will really take off, April 1 I feed them to give them a boost and by now I can usually find a few tiny tomatoes and flowering is in full swing. It is important to keep the water steady not soggy or with long dry periods or you end up with problems. By May you should be picking your first tomatoes and in June you will be busy, by the middle of July they start to slow down The high temperatures stop/slow flowering. Always leave as much foliage on your plants and if the top fruit are exposed they will burn in June so I would advise a shade cloth I use the cages as support and attach with clothspins. With the winds we have it is a good idea to make sure you take the extra time to really get your cages secure in the ground! They will blow over! By the beginning of August your tomatoes will be done! Good luck, Sunsprite

I don't much care for Early Girls as far as taste goes,try Heatwaves,Celebrity and Ace.
I've used cages and have let them grow on the ground.Two different schools of thought.The cages help with rot but expose your fruit to sunburn and birds.Growing on the ground protects your fruit from the sun and birds but your tomatoes rot easier.After the temp. hits 92 or so,your blooms will not set,this is when I cover the plants with shade cloth since you will not need pollination and shade cloth restricts bees as well as birds and sun.
Every year is different as far as tomamtoes go.Some years I have bumper crops and the next year will be sparse.Last year wasn't a good year for me.Late spring and then right to early heat.Good luck and don't give up,you'll get the hang of it.

You can Google "Sweet Tomato Test Garden" for info on growing heat tolerant tomatoes.

Hope this helps.

I keep trying different varieties each year but have found that starting early is the key. I have found the following tomatoes do will in my location in containers, Aka fax earthboxes. Roma, New Big Dwarf, and Bloody Butcher. I cover my plants starting at the end of May with shade cloth. They get the morning sun and late afternoon sun. Then cut the plants back a half to a third and keep fertawatering them with manure tea or half strength blue stuff that has a higher middle number of n p and k after the 4th of July. The shade starts being removed in Sept. The Cherries and grapes such as Cupid, Sweet 1Mil, Matts Wild Cherry, any other small bushy plant does well. I have grown some of the early varieties planted about 15 June for a fall planting. All plants need a thick mulch and some times daily watering but watch watering too much or too late in the day, watch the leaves they should show curl is the heat of the day but unroll in the evening. If you grow in containers as I do then cover the container with card board to keep the roots cool. I also trim off any branches that start to yellow, show heavy stress or turns brown.

What tomato lady said ... Google Sweet Tomato Test Garden and follow her advice.

I use straw as a layer of mulch. Saved me a lot of water!