As days grow shorter and nights grow longer in mid-August, plants have cooler nights to recover from hot daytime temperatures. You’ll see a flush of new leaf and twig growth as well as increased flower bud production during the next few weeks. Heat and drought stress in late June and all of July cause plants to become semi-dormant in order to survive our extreme summer conditions. Growth that slowed or stopped last month will resume (slowly) this month.
There’s no good reason to fertilize a semi-dormant plant, but as plants regain vigor this month they will need nutrients. Here’s a quick guide to late summer/early fall fertilization for our central San Joaquin Valley climate.
Roses – Roses bloom reliably six to eight weeks after fertilization. Our roses are at their best of the year in September/October when we have few insect or fungal disease problems. Deadhead any old flowers and feed each rose in mid-August with a half cup…
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