My tarragon plant is all dried up. I have it in an indoor garden planter. Will it rebloom if I just keep watering it? Should it be fed with plant food?
It may come back if the stem is still alive. If the stem is not dried out, the plant will re-grow its leaves. If the stem is dried out, the plant is dead and will need to be replaced.
While growing tarragon, should I deflower plants like I do while growing basil?
Yes, if you get flowers on any herb, it is best to take the flowers off. The flowers sap energy from the plant and it produces fewer and less flavorful leaves.
I have planted 2 tarragon plants, one in 2009 and one in 2010. They were the ones in 4" pots from a garden centre. However, the crop is very poor. They are in a sunny position in medium rich soil in a raised bed. They are watered daily and do not get waterlogged as the bed is raised. How can I get a better crop than 6 sprigs?? Should they spread each year?
I would start pinching the plants at a rather early stage. This will encourage branching. This article has more information on that:
Some varieties grow back better than others. I would recommend purchasing a named variety from a reputable nursery. While you keep the ground dry, snow and rain in the winter can be over watering it in the cold, which will kill the roots. A more hardy variety will be better able to survive this.
I have had the plant for many years. Last year it seemed weak, so I divided it. This year the plant seemed to come up strong but without any taste in the leaves. Seems odd to me.
This happens to herbs when you are too nice to them. The better their conditions, the weaker and more diluted their flavor becomes. They need to struggle a bit to have good flavor.
At the very least, do not fertilize your tarragon. Do not provide more than 2-3 inches of water a week, if you can help it.
Which is the best way to harvest the leaves to keep the plant growing new sprouts? I'm new to this (obviously), but if I have a small plant and I harvest all of the leaves, how do I get the plant to sprout new growth?
Do not harvest all of the leaves, only what you need. Also, pinching the plant will promote more bushier and lush growth. Here is more information: https://www.gardeningknowhow.com/edible/herbs/tarragon/growing-tarragon-in-the-herb-garden.htm
I have been growing my tarragon for 6 weeks now, and it's only about 1 inch tall and it's spread out in the pot. Is this correct? I need to know how long it takes to get a mature tarragon plant.
Well, depending on the type of tarragon you have, I would guess about 90 -120 days after planting (seeds) that it would be mature. They also grow 2-3 feet tall.
I have bought French tarragon for 3 years straight and can't get it to come back. I never bring it in at winter. What I was wondering is if you need one plant for it to spread or do you need more than one? It looks like when it grows it is just one long string. Do you water it during the winter when it dies out? If you can give me some good tips, I would appreciate it. When it gets real hot, I put it in the shade. Is that a good thing?
In your region, they should not have too much trouble coming back, especially with a generous layer of mulch in winter. You can, however, grow this plant indoors as well. You don't water plants over winter, though those grown indoors may need watering once a month just to keep the pot from becoming overly dry. Placing the plant in the shade during hot weather is a good thing, though remember that potted plants require more watering than those planted in the ground (daily, sometimes twice, in temps over 85 F). These plants share similar growing requirements as regular tarragon, so these articles should help: https://www.gardeningknowhow.com/edible/herbs/tarragon/growing-tarragon-in-the-herb-garden.htm, https://www.gardeningknowhow.com/edible/herbs/tarragon/growing-tarragon-indoors.htm, https://www.gardeningknowhow.com/edible/herbs/tarragon/growing-french-tarragon.htm Also, If you are trying to cover a large area with these plants, you will need more than one. To get you plant bushier, you may need to pinch it. This article will help with that: https://www.gardeningknowhow.com/edible/herbs/hgen/making-herbs-bigger-through-pinching-and-harvesting.htm