Hollands Hope is one of the oldest and hardiest outdoor cannabis strains, carried at Growlantis as the Dutch Passion feminized line. It was bred for the cool, damp Dutch climate, so its claim to fame is resilience: strong resistance to mold and the ability to finish outdoors where fussier strains rot. It is a tall, high-yielding, indica-leaning plant with a relaxing effect and a classic earthy, piney flavor. 

This is a photoperiod feminized strain, so it flowers when you shorten the light cycle. Potency is modest by modern standards at 10-15% THC, which is part of its old-school, reliable character. The figures below are Dutch Passion breeder values; check your own pack for the exact numbers. 

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Hollands Hope Grow Info 

Trait Hollands Hope (Dutch Passion) 
Genetics Original Hollands Hope 
Seed type Feminized (photoperiod) 
Genetic profile 60% indica / 40% sativa 
THC 10-15% (medium) 
Flowering time 8-9 weeks 
Height Up to 1.75 m, a tall plant 
Indoor yield High, up to 500 g/m² 
Outdoor yield XL, up to 600 g per plant 
Effects Relaxed, giggly, mildly energetic 
Flavor Pine, earthy, woody, peppery, floral 

These are Dutch Passion’s published figures for the Hollands Hope line at Growlantis. When you need an exact THC percentage, height, or yield, check the specification on your own Hollands Hope seed pack. 

What Makes Hollands Hope Worth Growing 

Hollands Hope is a specialist, and its specialty is survival. Bred for the Netherlands’ cool, wet autumns, it shrugs off mold and damp conditions that ruin dense modern hybrids, and it still finishes outdoors with a huge harvest. If you grow outdoors in a difficult climate, few strains are as dependable. 

The trade-off is potency. At 10-15% THC it is mild by today’s standards, with a relaxing body effect and a giggly, lightly energetic lift rather than an overwhelming high. For many growers that is the point: an easygoing, old-school smoke on a plant that forgives bad weather and beginner mistakes, and rewards you with up to 600 g per plant outdoors. 

Is Hollands Hope Indica or Sativa? 

Hollands Hope is indica leaning, listed at 60% indica and 40% sativa. The balance shows in both the plant and the effect. 

The plant is tall and vigorous with the hardiness of its indica side, while the sativa share keeps the high from being purely sedating. The effect is relaxing and comfortable, with a giggly, sociable edge, so it works as an easygoing all-rounder rather than a heavy nighttime knockout. 

Flowering Time and Total Grow Time 

Because Hollands Hope is a photoperiod strain, two timing numbers matter, and they are not the same. 

  • Flowering time: 8-9 weeks. This is the bloom stage, and it starts only when you switch the lights to 12/12 indoors, or the outdoor days shorten in late summer. 
  • Total grow time (seed to harvest): flowering plus your veg period. Veg length is yours to set, so a typical indoor run from seed lands around 12-15 weeks depending on how long you veg. 

Outdoors, the reasonable flowering time plus the strain’s weather resistance is exactly why it finishes reliably in cool climates, usually by early to mid autumn, before the worst damp arrives. 

Does Hollands Hope Need a 12/12 Light Cycle? 

Yes. Hollands Hope is a photoperiod strain, so indoors it needs a 12/12 light cycle to start flowering. You veg it under a longer schedule, usually 18/6, then switch to 12 hours on and 12 off to trigger bloom. 

Outdoors the season does this for you, with flowering starting as the days shorten in late summer. This is the key difference from an autoflower, which blooms on age no matter the light schedule. 

Tall cannabis plants growing in raised outdoor beds with clear blue skies.

Hollands Hope Grow Timeline, Week by Week 

Veg length is up to you, so the flowering weeks are the fixed part. Adjust the start to suit your space. 

  • Weeks 1-2: germination and seedling. The taproot and first leaves establish. Keep water light and conditions stable. 
  • Weeks 3-6: vegetative growth. The plant builds height fast. Top it and train early, since it grows tall. 
  • Flip to 12/12: switch the light cycle when the plant is about two thirds of your target height, to leave room for the stretch. 
  • Flower weeks 1-3: the stretch and first pistils. Set your supports. 
  • Flower weeks 4-7: buds fill in and the earthy, piney aroma builds. 
  • Flower weeks 8-9: ripening and harvest. Judge by the trichomes, not the day count. 

Choosing Your Setup: Space, Light and Pots 

Plan for height. At up to 1.75 m, Hollands Hope wants vertical room indoors, so keep veg short and train, or grow it outdoors where its size is an asset. 

Light should be strong and even to fill out the tall frame. A full-spectrum LED at 30-40 watts per square foot over a trained canopy gets the most from its high yield. Keep airflow good, though this strain’s mold resistance gives you a real safety margin. 

For containers, use 5-7 gallon pots indoors, or larger fabric pots and open ground outdoors where it can reach its full size. As a photoperiod, it transplants fine, so you can pot up as it grows. 

Germinating and Raising Seedlings 

The paper towel method is the easy, reliable start. Soak the seeds for 12-24 hours, then set them between damp paper towels on a covered plate, kept dark and warm at 70-85°F (21-29°C). A taproot usually shows in two to three days. 

When the root reaches about 1-2 cm, plant it root-down a knuckle deep in a light, airy mix and keep the surface moist until it breaks ground. New to germination? Our beginner growing guides walk through it step by step. 

The Vegetative Stage and Training 

Because Hollands Hope is a photoperiod plant, you can veg as long as you like and use the full training toolkit, which autoflowers cannot handle. 

Top it early and use LST or a SCROG net to control the height and spread the canopy, since this is a tall, vigorous strain. Keep nitrogen available through veg, and remember it will stretch for two to three weeks after you flip to 12/12, so flip before it reaches your ceiling. Outdoors, let it grow and simply stake the heavy branches. 

Cannabis seeds tested for quality control with magnifying tools on a wooden table.

Feeding and Watering Hollands Hope 

Feed to the plant’s size. A big, vigorous strain can take a full nutrient schedule, but build it up gradually and read the leaves rather than chasing the bottle. Use a nitrogen-forward base through veg, then shift to a bloom formula higher in phosphorus and potassium once you flip to 12/12. 

Water by root-zone moisture. A large plant drinks heavily in late veg and flower, so expect demand to climb, and let the top layer dry between waterings to keep oxygen at the roots. 

Flowering and Knowing When to Harvest 

After the flip, the plant stretches for two to three weeks, then settles into bud production. The earthy, piney, peppery aroma builds through the middle weeks. Its mold resistance really pays off here, letting the buds finish even in damp conditions, though good airflow still helps. 

As the 8-9 week window closes, let the trichomes decide. Harvest when most are cloudy with a few amber. After the cut, hang the branches in the dark at about 60°F (15-16°C) and 55-60% humidity for 7-14 days, then cure in jars, burping daily for the first weeks. 

Growing Indoors vs Outdoors 

Indoors, the main task is managing the height. Keep veg short, flip early, and train into a flat canopy under strong light, and the 500 g/m² indoor yield is reachable. 

Outdoors is Hollands Hope’s home turf. Its weather resistance and 600 g per plant potential make it a top choice for growers in cool, wet, or unpredictable climates where other strains fail. Plant after the last frost, give it full sun and a large root run, and let its hardiness do the rest. Minimal fuss, big reward. 

How Tall and How Much? Height and Yield 

Height is the planning point. Hollands Hope reaches up to 1.75 m, so give it room outdoors or train and flip early indoors. 

Yield is a headline feature: up to 500 g/m² indoors and an XL 600 g per plant outdoors. Those are top-end breeder figures, so strong light, canopy management, and healthy roots are what move you toward them. Few strains combine this much outdoor yield with this much weather resistance. 

Best US Climates for Hollands Hope 

Here is where Hollands Hope flips the usual advice. Most strains want warm, dry conditions, but this one was built for the opposite, so it is the pick for cool, damp climates where dense hybrids rot. 

Growers in the Pacific Northwest, New England, and the northern states get the most from it, finishing a big outdoor crop before the fall rains and cold shut other strains down. It also grows happily in California and the West, where the easy climate makes it nearly foolproof. In the humid Southeast, its mold resistance is a genuine advantage, though airflow still helps. For other varieties, browse our full how-to-grow library. 

Common Problems When Growing Hollands Hope 

Even a hardy strain has a few things to watch. 

Running out of vertical space 

At up to 1.75 m with a flowering stretch, Hollands Hope overgrows a short tent fast. Keep veg short, flip early, and top plus SCROG to hold a flat canopy indoors. 

Expecting high potency 

At 10-15% THC, this is a mild strain by modern standards. If you want a heavy high, this is the wrong pick. Grow it for reliability, yield, and weather resistance instead. 

Flipping to 12/12 too late 

This tall strain stretches hard after the flip. If you wait until it is near your light, the colas end up in the lamp. Flip at about two thirds of your target height. 

Harvesting by the calendar 

The 8-9 week window is a guide, not a cutting date. Read the trichomes and wait for mostly cloudy heads before you cut. 

Making the Most of Your Harvest 

Do not waste the trim. The sugar leaves make good bubble hash, dry sift, or infused oil, and a big outdoor plant leaves plenty of trim. The stems, roots, and fan leaves compost well and feed your next grow. 

Is Hollands Hope Right for You? 

If you grow outdoors in a cool, wet, or unpredictable climate and want a reliable, high-yielding plant, yes, this is one of the best choices there is. It is hardy, mold-resistant, and forgiving, ideal for beginners and difficult gardens. If you are chasing maximum potency, a modern high-THC hybrid will suit you better. For a hardy, compact alternative, see our Mazar Auto grow guide. 

Outdoor cannabis garden with neatly arranged hybrid plants growing under clear skies.

Frequently Asked Questions 

Is Hollands Hope indica or sativa? 

Hollands Hope is indica leaning, listed at 60% indica and 40% sativa. It grows tall and vigorous with the hardiness of its indica side, while the sativa share keeps the effect from being purely sedating. The result is a relaxing, giggly, lightly energetic high rather than a heavy nighttime knockout. 

Does Hollands Hope need a 12/12 light cycle? 

Yes. Hollands Hope is a photoperiod strain, so indoors it needs the light switched to 12/12 to start flowering. You veg it under a longer schedule like 18/6, then flip to 12 hours on and 12 off. Outdoors it flowers naturally as late-summer days shorten. 

How long does Hollands Hope take to flower? 

Hollands Hope flowers in about 8 to 9 weeks once you switch to 12/12. That is the bloom stage only. Total time from seed also includes your veg period. Outdoors, its reasonable flowering time and weather resistance let it finish reliably by early to mid autumn. 

How much does Hollands Hope yield? 

Hollands Hope is a heavy yielder: up to 500 g/m2 indoors and an XL 600 g per plant outdoors in good conditions. Those are top-end breeder figures. Strong light, canopy management, and healthy roots move you toward them, and outdoors its weather resistance helps protect the harvest. 

How tall does Hollands Hope grow? 

Hollands Hope is tall, reaching up to about 1.75 m, especially outdoors or with a long veg. Indoors you control the height by vegging less, flipping to 12/12 early, and topping. Expect it to stretch for two to three weeks after the flip, so leave vertical clearance. 

Is Hollands Hope good for cold or wet climates? 

Yes, that is its main strength. Hollands Hope was bred for the cool, damp Dutch climate and resists mold well, so it finishes outdoors in conditions that ruin dense modern hybrids. It is a top choice for growers in the Pacific Northwest, New England, and other cool, wet regions. 

Can you clone Hollands Hope? 

Yes. As a photoperiod strain, Hollands Hope clones well, unlike autoflowers. Take cuttings from a healthy plant during veg, root them, and keep them under long light until you are ready to flower. Cloning lets you keep a hardy, reliable phenotype for your next outdoor run.