By mid-summe, the stems of my French tarragon get woody and there is very little new growth. What are the best growing conditions for tarragon?
French tarragon is not particularly fussy about the type of soil it grows in, although the soil should be well draining, as tarragon can be susceptible to root rot. As you’ve noticed, the plant is somewhat woody. Don’t worry about this. It is fairly drought tolerant and for that reason, I suggest deep but less frequent waterings, letting the soil dry out in between. It is not uncommon for growth to taper off in the heat of summer. You can mulch to discourage weeds and maintain moisture in the soil. As for fertilizer, it is not necessary, as like many herbs, the flavour will be stronger when tarragon is growing in nutrient poor soils.