Before you buy Granddaddy Purple seeds or clones, demand the exact flowering time and yield data for the specific cut. Granddaddy Purple can finish in 8 to 11 weeks indoors, but some phenotypes take longer. A vendor that cannot provide lab tests, harvest dates, and breeder lineage is not worth your money.

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What to look for when buying Granddaddy Purple

You want clear flowering time, yield per square meter or per plant, and whether the seeds are feminized or regular. Look for lab reports for potency and pesticides. Ask about the breeder. A reputable seller will list these details upfront.

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Parameter bands for GDP grow time and yield

Common pitfalls

FAQ

How long does Granddaddy Purple take from seed to harvest?

Indoors, add 3 to 4 weeks of vegetative growth to the 8 to 11 week flowering time. Outdoors, plant in spring and harvest in late September or early October.

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What yield can I expect from Granddaddy Purple?

With good light and nutrients, expect 300 to 500 grams per square meter indoors or 400 to 600 grams per plant outdoors. Yield depends on grow skill, light, and phenotype.

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Is Granddaddy Purple easy to grow?

It is moderate. It needs stable temperatures and low humidity in late flower to avoid mold.

When should I buy Granddaddy Purple seeds?

Buy when you can verify the breeder, lab tests, and flowering time. Avoid sellers who do not list these details.