My plants are 6 foot tall and fill my 4 foot cage. One plant (Better Boy) has 28 green tomatoes. Others in my area are harvesting lots of tomatoes, but mine are still green. I have been suckering. Should I be pruning the end of the new shoots to discourage vine production and encourage fruit production?
I would not prune anymore at this time. It is probably a bit of the reason you have green tomatoes. The plant has been spending energy on healing cuts rather than fruit production and the fruit set a bit later. It is the trade off when you prune and sucker. It also sounds like you may have too much nitrogen, which would also contribute to delayed fruit setting. The excess nitrogen will work itself out over the season, but for next year, make sure you use a fertilizing mix (chemical or organic) with more phosphorous.
As for this season, the tomatoes will ripen. You just need to give it some time.
If I only have two tomato plants (a 'Better Boy' and a 'Big Boy'), will they pollinate each other to bear fruit?
Tomatoes are self pollinating. They do not need other tomatoes plants to produce fruit.
Tomatoes self pollinate. If you only had one tomato plant, you'd still get plenty of tomatoes. No worries.
How can I grow a robust dark green colored, but healthy fruit producing, tomato plant with the exception of a traditional "Miracle Grow" fertilizer? I grow Better Boys as a favorite. I have a soil tester. My plants do ok but have that "spindley" look. Looking for that deep dark green heavy base stalk plant. Have raised beds and amend the soil routinely.
Manure
I would recommend using a fish emulsion.
Below is a link about making your own, but it is readily available at any garden center.
I use it about once a week on my tomato plants. Follow the directions on the bottle for diluting the concentrate and applying to your tomatoes.
I also use epsom salt every couple of weeks. I have great success using these two simple, economical and natural fertilizers on all my vegetable plants.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/fish-emulsion-fertilizer.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/epsom-salt-gardening.htm
I live in central OK and have planted Better Boy tomatoes this year. The plants are quite tall and bushy, but no blossoms. We are having temps in the 100's, and I wonder if this is why they are not blossoming. My Romas, however, are putting out fruit. All are planted in raised beds (2 ft deep), have red mulch on them, are watered daily, and fertilized with one that contains calcium. Any suggestions?
In addition to the high temps, it sounds like you may have too much nitrogen in the soil. High nitrogen will encourage foliage growth and discourage blooming and fruiting. Add some phosphorus to the soil to combat this. Bone meal is a good source of this. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm
I have grown the Better Boy hybrid tomato for many years. Today, the seed (or plants) sold as "Better Boy" are most certainly not the same. Where can I buy good hybrid seed? Or plant? Thanks
Normally, we don't recommend places to purchase. I will say that Etsy, Amazon, and Ebay are good places to start, but personally, I go through Baker Creek Seeds.
Trying to figure out when to take vacation so I can harvest my better boy tomatoes for canning and making salsa. I usually plant around May 20th
Add 75 days to May 20 to come up with a timetable. They should be started inside about 6 to 8 weeks before planting outside. Here is more information on how to grow:
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-better-boy-tomato-plants.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/harvest-time-for-tomatoes.htm