Miracle Gro LIQUAFEEDER question for my pots
15 years ago
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- 15 years ago
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potting soil, cheapo stuff or the miracle gro?
Comments (44)Not all is as you might imagine it to be. I save a lot of the stuff I write as a document when the question comes up over & over. Coffee & tea as plant 'tonics' is a frequent topic. Here's what I discovered: Forum discussions frequently center on the question of adding dilute coffee/tea or grounds to plants as a 'tonic', but Arabica (coffee) and Camellia (tea) are known for their toxic alkaloid (caffeine) content and their allelopathic affect on plants as well as autotoxic (poison to their own seedlings) effects on future generations. Caffeine interferes with root development by impairing protein metabolism. This affects activity of an important bio-compound (PPO) and lignification (the process of becoming woody), crucial steps for root formation. We also know that the tannins in both coffee and tea are known allelopaths (growth inhibitors). There are ongoing experiments to develop herbicides using extracts from both coffee and tea that cause me to want to say they might serve better as a nonselective herbicide than as a tonic. I would not use either (stale coffee or tea) by applying directly to my plants - especially containerized plants; nor would I add tea bags/coffee grounds to my container soils. Rob - you can use white vinegar or citric acid (and other acids, but stick with the safer stuff) to lower the pH of your irrigation water (for the acid lovers) to about 5.5. Note how much acid is required per unit (like a gallon or 5 gallon unit) and repeat as needed. Note that pH of freshly drawn water rises as the dissolved CO2 gases off over a 24 hr period, so let the water you'll use rest for a day before adding the acid (first time only) for an accurate read. You'll need some pH paper - like what is used for ponds or aquariums. Al...See MoreMiracleGro Potting Mix versus SuperSoil Potting Soil ???
Comments (9)Do you have an easy recipe of making your own mix for a gardening-beginner? Yes. I would recommend using what is known around here as 'Al's 5-1-1 mix' for annuals and perennials grown for just a year or two before being repotted. For plants that will stay in the same container/mix for more than 2 years I would recommend what is known around here as 'Al's Gritty mix'. The 5:1:1 mix is 5 parts pine bark (very small pieces), 1 part perlite and 1 part peat. The gritty mix is 1 part pine bark fines, 1 part Turface MVP and 1 part grower grit (#2 sized). For more information on this I will refer you to this thread. Don't get too hung up on specific ingredients and percentages. The principle is using ingredients that will be of a large enough size (above 1/16th inch) for as long as the plant will be in the mix. This provides superior aeration. The higher the percentage of organic matter such as peat or bark, the faster the mix breaks down and aeration suffers. The bark breaks down much slower than peat though. Anyway, read the thread and you will learn a lot. If you can't find suitable ingredients to make your own mix in time to get the season started then just get the regular MG potting mix and take until next year to learn more and locate sources for ingredients you want....See MoreMiracle Gro Potting mix problems
Comments (66)Irene, I'd like to send you a personal message, but your settings don't allow. Maybe you'd consider sending me your email addy in a Houzz message? Sometimes explanations get lost in the back and forth between people with different viewpoints, but the fact is, soils with a large % of fine particles are always going to pose limitations that result from too much water retention. Even though that fact is carved in stone and can't be argued (because it's governed by predictable laws of physics), there are those very few that insist on arguing the point over and over. Any roots existing within the perched water column will be deprived of O2 for the duration of the saturation. I made that last period bold, but you probably didn't even notice. ;-) The question isn't whether geography or hot dry hurricane windy conditions lift the limitation imposed by the saturation, they don't; the only question is, "How long will the limitations last". In many cases, the answer is measured in weeks, in some cases, in days. A good guess about how a soil like Mg amended with some bark & perlite (let's say 5 parts soil, 1 part perlite, and 1 part pine bark) performs might go like this: Day 1, grower waters established houseplants heavily, to beyond saturation, so water exits the drain. At that point, limitations are most severe. Day 2-5, the degree of limitation gradually decreases until day 5 when the soil is reasonably well aerated and the plant is pouring energy into replacing the fine roots killed by the soggy conditions. Day 5-6, The plant has grown at it's best these 2 days because the soil is moist and about as well aerated as it can be. Almost all the roots killed by saturation have been replaced at a considerable cost in terms of energy outlay. The plant is pretty happy, but the soil is now becoming too dry for the plant to efficiently take up water and the nutrients dissolved in water. It's on the verge of suffering drought stress. Day 7, the grower waters, cycle begins anew. That isn't an exaggeration. It describes a soil that needs weekly watering. Now, a soil in a soil that holds little perched water. The soil is based on a very high % of coarse material (pine bark, perlite, peat or a water retentive bagged soil). NOTE that the ingredients are the very same ingredients as the soil discussed immediately above. The ONLY difference is the ratio of ingredients used. Day 1, grower waters established houseplants heavily, to beyond saturation, so water exits the drain. At that point, limitations are most severe, but still minimal because the soil is designed so the ht of the perched water column and saturation is minimal. Day 2, Perched water is gone, the plant is enjoying a well-aerated soil from top to bottom. Fungus gnats on notice to find more favorable accommodations. This continues until day 4 or 5. Day 4 or 5, fungus gnats have sent out scouts. Other's making preparations to leave this God forsaken place. Plant still happy, but need to water growing imminent. Day 5, grower waters & cycle begins anew. The only price paid for the second scenario is the need to water more often. The first soil was 'amended' with pine bark and perlite, so those would have been on hand anyway. Some might say I'm not going to water 100 plants every 4th, third, every other, or even every day. That's fine, but that convenience demands a soil with enough water retention to get you through whatever interval is desired by the grower. The grower might like the respite from frequent watering, but the plant won't. Convenience very often comes at a price to the plant. That's not judgmental, it's simply how things work. The gritty mix you mentioned holds no perched water if made correctly, so plants are happy from watering time until such time they need another watering. Again, because we've moved away from a perched water table entirely, the need to water the gritty mix comes more frequently than say the 5:1:1 mix, and much more frequently than a soil like you're using. It's also sometimes a challenge to find the exact ingredients, but because the gritty mix recipe I offer as a starting point is nothing more than 1 way to embody a concept, it can be worked around fairly easily. I'll watch for a message with your address. Al...See MoreQuestion about Miracle Gro Rose potting soil
Comments (4)That is a bummer. Heard it often here this year. I wish they would mark those bags better! It says on the garden soil bags that it isn't for use in containers but it is small print easily overlooked and many have fallen into the same trap you have - discovering its problems only AFTER they planted. I assume you know that there is much better (and cheaper) stuff than MG that's available for your WS containers? Dave...See MoreRelated Professionals
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tapla (mid-Michigan, USDA z5b-6a)