What must I do to make the fruit on my grapefruit tree sweet? It is bitter now.
Most grapefruits are generally on the 'tart' side naturally, though the red/pink varieties are sweeter. Sometimes you can try increasing the fertilizer and making sure the soil is slightly acidic, around 6.5. This should sweeten the fruit. This article will help too: https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm
I have what appears to be a young grapefruit tree growing from one of the roots of a mature grapefruit tree - about 12 feet from the trunk. Will this young tree grow and produce fruit of its own? Can it be dug out and transplanted? Can I graft an orange tree branch to it? Mike
You can try to repot or move the growth. Either way it is best to remove this growth as it is likely taking energy from the tree.
Keep in mind that the new tree may not be the same as the mother tree. It is likely some citrus variety.
Here is a link with more information.
Our white grapefruit tree does not have any fruit this year. Last year it had quite a few. Any ideas why no fruit this year? We also have a lemon tree that is at least 3 years old and has never had any fruit. We were thinking about taking it out.
There can be several reasons and combinations of reasons for lack of fruit.
Water, sun, pollination, and fertilizer are keys to tree production.
I would encourage you to have the soil tested as a great place to start, especially before removing a tree planting.
Your Lemon tree is still quite immature and really only began to enter the fruiting years at about 5 years.
Here are some links with more information.
https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-not-fruiting.htm
https://www.gardeningknowhow.com/edible/fruits/citrus/tip-on-water-requirements-for-citrus-trees.htm
https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm
https://www.gardeningknowhow.com/edible/fruits/grapefruit/grapefruit-tree-not-producing.htm
https://www.gardeningknowhow.com/edible/fruits/grapefruit/hand-pollinating-grapefruits.htm
I've managed to grow a small sprout from a grapefruit seed. I live in India where it's very hot. Can I continue to grow it in a pot with diameter of about 15 inches?
Be careful not to put the seeding in to large of a pot while it is still small.
When the seedling has several sets of leaves you can move it to a 6 inch pot.
Your plant need 4 to 6 hours of bright sunlight daily and temperatures in the 60 to 70 degree F range.
When the plant is 4 to 5 inches tall you can move it to a bigger pot.
Why are some grapefruit rinds thick and some thin? What causes that? Is it true that the fruit will be tart on tree with thorns?
Very simply, a thick peel on any kind of citrus fruit is caused by a nutrient imbalance. You can read more about this here: https://www.gardeningknowhow.com/edible/fruits/citrus/citrus-fruit-thick-rind.htm
And, no, the presence of thorns is not an indicator of a fruit's tartness or sweetness.
My grapefruits have too many seeds. What can I do to reduce the number of seeds? Thank you.
Do you know the cultivator that you are growing?
Your 'seedy' fruit may be nothing more then the variety you are growing.
Good growing conditions will give you the the best fruit possible, full of flavor but will still contain upwards of 70 seeds if your growing a seedy variety.
Here are some links with more information.
http://charlotte.ifas.ufl.edu/publications/REM-11212008-045--Grapefruit.pdf
https://aggie-horticulture.tamu.edu/syllabi/422/grapefrt.htm
https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm
Leaves turn yellow and looks like it will die.
This could be watering issues. Grapefruit Trees need water, especially during dry spells, but too much water will also cause the leaves to yellow and drop off.
Adjust watering and make sure that the soil is properly draining.
A young Grapefruit Tree may have some yellowing of leaves in the Spring, but generally will correct itself.
Nutrient deficiencies can cause yellowing of leaves. An application of micronutrient sprays can help.
Excess fertilizer may cause yellowing of leaves.
Check for other signs of disease or insects.
Sun Scorch is also possible, if the yellowing of leaves is on the west or south side, where the sun is strongest this can be the cause.
https://www.gardeningknowhow.com/edible/fruits/grapefruit/growing-grapefruit.htm