I have read that by trimming the tertiary vines on a squash plant you can have bigger, better fruit. What is the tertiary vine? Also, can you have too many squash on one plant? Will it cause trouble? Thanks.
Squash normally grows two main vines that head off in opposite directions. Each of these vines produce a secondary vine and additional runners, or tertiary vines, appear off these secondary vines. It is usually recommended that these be removed by pinching them off to promote larger fruit growth, as it will direct the plant's energy towards the fruit growth rather than additional vine growth. Having lots of squash isn't necessarily a bad thing, unless there are so many that they are becoming stunted. You can remove some of the female flowers or smallest fruit if this is a problem for you.
Why are the leaves of my squash plants getting spots on them? I have not had any rain, and I only water every 3 days.
It sounds like you may have the start of powdery mildew. This article will help you: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm
Have a small (4x4) raised garden. It's divided into squares and has a plant in each square. It's a mixed veggie garden. The summer squash blooms quite well but fruit is stunted and falls off. Am watering every day. Have seen wasps around garden. What is causing fruit to fall off? Live in Houston, TX.
This article will answer your questions: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm
Not having much luck growing yellow squash. I have heard you should break off the first squash showing. True or false?
You do not need to. This advice is given under the theory that delaying fruiting (by removing early fruit) will make the plant stronger. This is not really true with squash (though it does work for longer lived plants like fruit trees). If you are not getting much fruit, your soil may have too much nitrogen or too little phosphorous. Add bone meal to the soil to help balance the soil back out.
Only the first year that I planted squash did I not battle squash borer. Each summer I get only a few squash before the borers invade and kill the plant. I've tried the aluminum foil around the base of the plant, I've stirred boric powder into the soil and still can't keep them from getting the plants. Sprays are ineffective as well. Do you have any solid suggestion for prevention?
It sounds like you may need to rotate your squash plants (i.e. move them to another location). Planting them in the same area year after year makes the plants more prone to these types of attacks, making treatment of the problem more difficult. Other than that, the best treatment I have found is to start treating your vining plants in the spring with an organic pesticide called neem oil. It is people and beneficial bug safe and is absorbed by the plant, killing the vine borers inside. You need to apply it weekly to the plants and is the best treatment I have seen for them.
I have tried rotation, traps, physically removing worms...need to kill the larvae in the ground before I plant.
Paul
Here are a couple of articles that may help you with your problem: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-pests-identifying-and-preventing-squash-vine-borer.htm
http://www.extension.umn.edu/garden/insects/find/squash-vine-borers/
Why are some of my immature squash rotting on the end? I am still harvesting mature veggies on the same plant, but some of them are rotting. Could it be that I am watering too much? I water every day. The plant is beautiful and healthy.
They have blossom end rot. This article will help: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-blossom-end-rot-causes-and-treatment.htm